3. Several species of fish live in the same area within a coral reef. Some hide among corals and filter passing plankton, others actively chase and eat smaller fish, and still others nibble on the coral. Based on the differences among these species, which of these would you predict is the main cause of the various "occupations” represented by the fish in the coral-reef ecosystem? А population sizes B limited food resources C adaptations that help determine niches D environmental conditions that result in crowding​