In a grassland, a red fox chases and eats field mice. What is the relationship between the fox and the mice?

In a forest, a gray squirrel raises its young inside a hollow hole in an oak tree, and the tree is not harmed.

In a garden, a honeybee drinks sweet nectar from a sunflower, and the sunflower keeps growing.

In a pond, a green frog snaps up dragonflies that fly close to the water. What is the relationship between them?

In a coral reef, a clownfish hides safely among the stinging arms of a sea anemone. Which is true about these two animals?

In a desert, kangaroo rats and harvester ants both gather seeds from the same dry ground, and seeds are scarce.

On a rocky shore, barnacles and mussels both need the same bare rock to fasten themselves onto, and the rock is crowded.

In one field, tall sunflowers grow above short bean plants and shade them from the sun all afternoon.

A barn owl swoops down and eats a vole, so the owl is the predator and the vole is the prey.

In a dry pasture, mesquite trees and the grasses around them pull water from the same soil, and rain is rare.

A woodpecker drills a hole in a dead tree and leaves it empty, and the next spring a chickadee raises its young inside that hole.

Two robins that pull worms from the same small yard do not affect each other in any way.

In one lake, scaup and ring-necked ducks both dive for the same small snails on the lake bottom, so the two ducks compete.

Great blue herons in a marsh eat frogs. One dry summer most of the frogs die. What most likely happens to the herons?

Foxes hunt rabbits in one meadow. Over a year almost all of the foxes leave. What most likely happens to the rabbit number at first?

Bluegill and perch in one pond both eat the same small water insects. Many more perch move into the pond. What happens to the bluegill?

Bats in a woodland roost inside hollow dead trees. A storm knocks down most of those trees. What most likely happens to the bats?

Barn owls in a field hunt voles. A mild year lets the vole number grow much larger. What most likely happens to the owls?

In one forest a great horned owl hunts mice at night and a red-tailed hawk hunts the same mice by day, so the two birds never meet.

In a stream, crayfish and small darter fish both hide under the same few flat stones. Why do these two animals compete?