Refer to Figure

Multiple Choice

Refer to figure. The diagram represents top-down control of two food webs with three trophic levels.The food web represented on the left includes omnivores, and the one on the right does not.Which effect of omnivores most directly results in the decreased size of the primary producer level shown on the left?

A) Competing with other omnivores
B) Competing with primary producers
C) Feeding on primary consumers
D) Feeding on primary producers
E) Preying on top carnivores