The term 'Parts of a Forest' can refer to a variety of elements, but the most common part is TREES. TREES are the main component of a forest, providing shelter and food for animals, as well as oxygen for humans. Other parts of a forest include shrubs, grasses, mosses, fungi, and other plants. Animals, such as birds, mammals, reptiles, and amphibians, also inhabit forests. Soil, water, and air are also important components of a forest ecosystem.