The term for animals that primarily eat plants is "herbivores." Herbivores have evolved various adaptations to efficiently digest plant material, often having specialized teeth for grinding foliage and complex digestive systems to break down cellulose. Common examples of herbivores include cows, elephants, and many species of insects. These animals play a crucial role in ecosystems as they help maintain plant populations, contribute to nutrient cycling, and serve as a food source for carnivores. While most herbivores eat a range of plant materials, some may have specific dietary preferences, leading to various classifications within herbivory.