Herbivorous animals are those that primarily eat plants. This diet includes leaves, fruits, seeds, and roots. Common examples of herbivorous animals are cows, deer, and elephants. Their digestive systems are adapted to break down tough plant materials, allowing them to extract the necessary nutrients. These animals play a crucial role in ecosystems by helping to maintain plant populations and providing food for carnivorous animals. Herbivores can also influence the structure of their habitats, as their grazing can promote the growth of certain plant species while controlling others.