What is a major food source for other organisms, including humans?\nOptions:\n- (A) gastropod shells\n- (B) orchids\n- (C) invertebrates\n- (D) swamp vegetation\n- (E) Most plants\n- (F) insects\n- (G) barnacles\n- (H) animals
Let’s work this out in a step by step way to be sure we have the right answer.
(C)
Mollusks are a major food source for other organisms, including humans.

Mollusks are invertebrates and are no exception.

Invertebrates are a major food source for other organisms, including humans.

.

So, the answer is (C)