Answer the following question given this paragraph: 

Many mammals are herbivores. Herbivores are heterotrophs that eat only or mainly plant foods (or algae). Depending on the species of mammals, they may eat leaves, shoots, stems, roots, seeds, nuts, fruits, flowers, and/or grasses. Some mammals even eat conifer needles or tree bark. Mammals that are herbivores include rabbits, mice, sheep, zebras, deer, kangaroos, and monkeys. The manatee in Figure below is also a herbivorous mammal. It eats mainly kelp (seaweed).


Q: Herbivores are heterotrophs that eat only or mainly what?

 Choices:

- decayed matter

- animals

- fish

- plants

A:
plants
