Which statement describes the role of the caterpillar in this food chain?
A) It is a carnivore because it consumes the frog.
B) It is a producer because it uses the sun for energy.
C)It is a herbivore because it eats the flower for energy.
D) It is an omnivore because it consumes the flower and frog.

Which of these describes the role of the vole in the Yellowstone ecosystem?
A decomposer
B producer
C herbivore
D carnivore

Which of these best defines the term pollutant?
A) anything humans add to the atmosphere and oceans
B any substance that is harmful to the environment
C any substance that is a waste product of industry
D a substance that does not break down over time