Animals that eat only plants are known as:

The correct option is B

Herbivores

Herbivores are organisms that feed exclusively on plants. Cow, deer and elephant are examples of herbivores. Carnivores are organisms that depend on other animals for their food. Omnivores are organisms that depend on both plants and animals for their food. A parasite is an organism that lives on or in a host organism and gets its food from its host.