In a Certain Ecosystem, Caterpillars Eat Grass

Multiple Choice

In a certain ecosystem, caterpillars eat grass. Field mice eat the caterpillars and seeds from the grass. Snakes eat the mice. Hawks eat both the snakes and mice. Such an arrangement would be considered a(n)

A) food web.
B) food chain.
C) ecosystem.
D) first trophic level.
E) second trophic level.