The term used for animals that only eat plants is "herbivores." Herbivores have evolved specific adaptations to help them digest plant material, which can be tough and fibrous. Common examples of herbivorous animals include cows, deer, elephants, and rabbits. Their diets consist of various plant parts, including leaves, stems, roots, and fruits. Herbivores play an essential role in the ecosystem, as they help to maintain plant populations and are key prey for many carnivorous animals. The interaction between herbivores and plants is crucial for the balance of ecosystems.