(a). sheep.
(b). salmon.
(c). grasses.
(d). bats.
(e). animals.
(f). shrubs.
(g). humans.
(h). trees.

Fact 1: Many consumers feed at more than one trophic level. Fact 2: Cows and sheep are examples of primary consumers. Given the two facts above, what can feed at more than one trophic level?
Answer:
(a).