Plant eating animals are called herbivores.
Herbivores have a diet of strictly things that need photosynthesis to live - plants. They have unique digestive systems which are longer and can digest cellulose.
There are three types of herbivores, folivores (eats leaves and shoots of trees), frugivore (eats fruits), and xylophages (eats woods and barks of trees).
These animals get their energy from the plants they consume, indirectly getting it from the light energy from sun used to synthesize water and carbon dioxide consumed by plants.
