The diet of an herbivore primarily consists of plant material. This includes various parts of plants such as leaves, stems, fruits, seeds, and roots. Herbivores have evolved specialized digestive systems that allow them to break down complex plant fibers, such as cellulose, which is tough for many animals to digest. Some common examples of herbivores are cows, horses, and rabbits. Many herbivores also have adaptations like flat teeth for grinding plant matter and longer digestive tracts for improved nutrient absorption. This plant-based diet supports their energy needs and is vital for their overall health and growth.