Some crustaceans feed on\nOptions:\n- (A) phytoplankton\n- (B) fungi\n- (C) refraction of light\n- (D) heat energy\n- (E) an organism's body\n- (F) carbon\n- (G) algae\n- (H) salt and water. OK. Let's think hard:
User
Zooplankton are tiny animals that feed on phytoplankton. Many zooplankton are crustaceans. Some crustaceans feed on phytoplankton.
So, the final answer is (A).
Assistant