Plant-eating animals, also known as herbivores, primarily consume plants, leaves, fruits, and vegetables. They play a crucial role in ecosystems by helping to control plant growth and providing food for carnivores. Common examples of herbivores include cows, deer, and elephants. Herbivores have specialized digestive systems to break down tough plant materials. Many possess flat teeth for grinding leaves and stems, while some, like rabbits, have unique adaptations to process cellulose. These adaptations allow them to extract the necessary nutrients from their plant-based diets efficiently.