You are presented with the quiz "What do animals use as a food course?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "heterotrophs get food by eating other living things" and "animals are heterotrophs, or other-feeders". So, what's the best answer to the question?
Options: A. it keeps an organism warm. B. water. C. Generating heat. D. Organic compounds. E. deadwood. F. light energy. G. other living things. H. inorganic.
G.