Animals which eat only plants are called asAParasitesBHerbivorousCCarnivorousDOmnivorous

Dear student 

A carnivore organism derives its energy and nutrient requirements from animal tissue. A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example, foliage, for the main component of its diet. The parasite is an organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense. 
Therefore, the correct answer is option B.

ANSWER
An omnivore is an animal who derives its energy and nutrients from a variety of food sources that may include both, plants and animals. A carnivore organism derives its energy and nutrient requirements from animal tissue. A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example, foliage, for the main component of its diet. The parasite is an organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense. 
Therefore, the correct answer is option B.