A flu outbreak spreads through close contact among residents and reaches nearly everyone in a town, whatever their age, wealth, or status. Which diffusion type does this show?

A new slang term starts with one lunch table, then spreads to friends at nearby tables and later to the rest of the school. What type of diffusion is this?

A neighborhood recipe becomes common as families share it with next-door neighbors, who then pass it to other nearby households. Which diffusion type fits?

A clothing style appears first on celebrities in global fashion centers, then in big-city stores, and only later in small-town shops. Which diffusion type is shown?

A banking practice starts in headquarters in national capitals, then appears in regional offices, and finally reaches local branches. What type of diffusion is this?

A music app is adopted first by famous performers, then by regional DJs, and later by ordinary listeners. Which diffusion type best fits?

Vietnamese refugees open pho restaurants in several U.S. cities after leaving Vietnam. Which diffusion type carried the food tradition?

Irish immigrants brought St. Patrick's Day customs to cities where they settled in North America. Which diffusion type explains the spread?

Traders who settled in port towns carried a weaving pattern from its hearth to distant markets. What diffusion type is described?

An irrigation method spreads to nearby villages and also to a distant city far outside that zone, while the first village keeps using it. Which broad diffusion type is shown?

A prayer practice gains followers in the shrine's immediate area and, separately, in a major city far from the shrine, while the shrine community keeps practicing it. Which broad diffusion type is this?

A radio catchphrase becomes popular across a station's listening area and is also picked up by a station in a distant city outside that area, while the original station still uses it daily. Which broad diffusion type fits?

A lunch slang term spreads from one campus to nearby campuses as students copy friends. Which type of diffusion does the map show?

Families carry a holiday custom along the arrows when they move. Which diffusion type does the map show?

The figure marks only world cities in the first wave of adoption while nearby small towns wait until later. Which diffusion type is shown?

A radio catchphrase spreads along the arrows as the station keeps broadcasting from its original market; no movers are needed. Which broad type is shown?

Merchants establish communities at stops along the mapped routes and teach a weaving style there. Which type of diffusion is shown?

A record system appears first in national offices and then in regional offices marked on the map. What diffusion type fits?

Use the case map: reports cluster nearest the pump first and thin out with distance. Which type best fits this spread?

A meme moves from campus to campus along the arrows as students share it with friends. Which type is shown?

Use the diagram. An idea is adopted first in the inner ring, then in each ring farther out. Which specific diffusion type does it show?

A festival chant is copied by visitors in the towns along the mapped route, without a central order. Which type is shown?

In the figure, a new work policy appears first at the top tier and then at each lower tier in order. Which diffusion type is this?

A medical technique appears at the top tier in the diagram, then moves downward through the other tiers. Which diffusion type fits?

The diagram shows a curriculum adopted first at the highest level and then passed to each lower level. Which diffusion type is represented?

A mobile banking service starts in the top tier of the diagram and later reaches the lower tiers. What diffusion type does this show?

A media format starts at the top tier in the figure, then moves to the middle tier and finally to the bottom tier. Which type is it?

Chinese porcelain reached Europe, but workshops that could not reproduce it copied its shapes and blue designs onto earthenware. Which type is this?

A restaurant in India keeps the quick-service model of an American burger chain but replaces beef burgers with local vegetarian items. Which type fits?

Sequoyah saw that English used written symbols, then created a different syllabary for Cherokee. Which diffusion type does this illustrate?

A hilly city likes the bike-share idea from flat cities but adopts electric-assist bikes because ordinary bikes do not work well there. Which type is this?

Farmers see terraced rice fields but cannot grow rice in their climate, so they build terraces for potatoes instead. Which diffusion type is shown?

A country copies the idea of a high-speed rail hub but uses different train technology because the imported system will not fit its tracks. Which type fits?

A desert town copies the courtyard-house idea from another region but adds thicker walls and smaller windows for its climate. Which type is this?

A school cannot use a full outdoor soccer field, so it adopts the basic game as a smaller indoor version with modified rules. Which type is shown?

Buddhism reached China as monks and merchants traveled the Silk Roads and taught in the places they stopped. What mechanism carried the trait?

Punjabi migrants built gurdwaras in Britain and Canada and maintained Sikh practices there. Which diffusion type carried the practices?

Italian immigrants brought pasta-making traditions to Argentina, where their communities continued the practice. Which diffusion type explains this?

West African religious practices reached the Caribbean because enslaved Africans were forced across the Atlantic. Which mechanism carried them?

Spanish-language place names spread into parts of the Americas as Spanish settlers and officials established towns there. Which diffusion type carried them?