A pamphlet defines a seawall: "A seawall holds back storm waves so that the houses and roads behind it stay dry during a typhoon." How is the term developed?

A field guide defines the tarsier: "The tarsier is a tiny primate with huge round eyes, thin bony fingers and a tail longer than its body." How is the term developed?

A biology text defines a cell membrane: "A cell membrane acts like a guard at a gate, letting some materials in and keeping others out." How is the term developed?

An article defines volcano: "The word comes from Vulcan, the Roman god of fire. Sailors gave his name to a burning island in the sea long ago." How is the term developed?

A weather book defines clouds: "Clouds are sorted into three groups by the height at which they form: low clouds, middle clouds and high clouds." How is the term developed?

A health flyer defines leafy greens: "Leafy greens include malunggay, kangkong, pechay and alugbati." How is the term developed?

A manual defines a fuse: "A fuse melts and breaks the circuit when too much current flows, so the wiring behind it does not catch fire." How is the term developed?

A report defines a sinkhole: "A sinkhole is a bowl-shaped hole in the ground, usually steep-sided, with loose soil and rock slumping toward its center." How is the term developed?

A science text defines the heart: "The heart works like the pump in a water system, pushing blood along narrow tubes to every part of the body." How is the term developed?

A dictionary note on quarantine: "It comes from the Italian word for forty. Ships once waited forty days offshore before the sailors were allowed to land." How is the term developed?

A textbook defines rocks: "Geologists divide rocks into three types by how they form: igneous, sedimentary and metamorphic." How is the term developed?

A civics text defines public services: "Public services include garbage collection, street lighting, health centers and fire protection." How is the term developed?

A coastal guide defines a mangrove: "Mangrove roots trap mud, slow the waves and shelter young fish until they are big enough for open water." How is the term developed?

A travel piece defines a jeepney: "A jeepney is a long steel vehicle with two facing benches, a low roof and bright painted panels along both sides." How is the term developed?

A study guide defines an outline: "An outline is to an essay what a skeleton is to a body. It holds the parts in place before anything else is added." How is the term developed?

An article defines boycott: "The word began with Charles Boycott, a land agent in Ireland whose neighbors refused to deal with him in 1880." How is the term developed?

A library guide defines prose: "Prose is grouped into fiction and nonfiction, and nonfiction is grouped again into essays, reports and biographies." How is the term developed?

A science text defines invasive species in the Philippines: "They include the golden apple snail, the janitor fish and the water hyacinth." How is the term developed?

A poster defines a rain gauge: "A rain gauge collects falling rain in a marked tube so that observers can record how many millimeters fell in a day." How is the term developed?

A weather journal defines the eye of a typhoon: "The eye is a round, calm opening at the storm's center, ringed by the tallest and thickest wall of cloud." How is the term developed?

A civics text defines a barangay: "A barangay is to a city what a room is to a house. It is the smallest unit inside the larger structure." How is the term developed?

A food column defines the sandwich: "It is named for the Earl of Sandwich, an English noble said to have asked for meat between two slices of bread." How is the term developed?

A music text defines instruments: "Instruments are grouped by how they make sound: strings, winds, percussion and keyboards." How is the term developed?

A geography text defines archipelago nations: "These include the Philippines, Indonesia and Japan." How is the term developed?

A town report defines a dam: "A dam holds back river water so that the town can draw drinking water and make electric power through the dry months." How is the term developed?

A market guide defines the durian: "The durian is a heavy oval fruit covered in hard, sharp spines, with a thick husk and soft pale flesh inside." How is the term developed?

A leaflet must help farmers spot blight in their own fields before it spreads. Which development do those readers most need?

Residents keep asking why their town is spending money on a retention pond. Which development would answer them?

A reader has never seen plankton and cannot picture it. The writer wants to tie the term to something familiar, such as dust floating in water. Which development is that?

A student asks which sea animals actually count as crustaceans. Which development answers that question most directly?

A reader knows what the word poem means but cannot say what kinds of poems there are. Which development would help most?

A reader asks why the Filipino dish adobo carries a Spanish name when the cooking method itself is native. Which development would answer that?

A first-aid card must let a bystander recognize heat stroke in a runner who has collapsed. Which development does that reader need?

New volunteers must understand what a ridge ventilator is for before they agree to install one on a school roof. Which development do they need?

A reader already understands how a bicycle brake grips a wheel. The writer now explains a car's disc brake. Which development uses what the reader already knows?

A reader has read the definition of root crop but still cannot point to one at the market. Which development would close that gap?

A research report states: "In this study, a household is counted as food secure if no member skipped a meal during the past seven days." What kind of definition is this?

A textbook states: "Erosion is the wearing away of soil and rock and its carrying off by water, wind or ice." What kind of definition is this?

A chapter explains drought across two pages. It gives the causes, names three types, and adds cases from Mindanao farms. What kind of definition is this?

An article explains urban heat island by contrasting a paved city block with a shaded park, then tracing how the idea was first measured in London. What kind of definition is this?