A habitat is the natural home or environment of a plant, animal, or other organism. It provides the organisms that live there with food, water, shelter and space to survive. Habitats consist of both biotic and abiotic factors. Biotic factors are living things. The main habitats are forests, grasslands, deserts, mountains and polar regions, and aquatic habitats. Habitats have abiotic features, meaning they provide life with physical factors needed to survive, and they provide life with the availability of food and the presence or absence of predators (biotic features).