1. Climate: Different mammals are adapted to different climates. For example, polar bears are adapted to living in cold, Arctic environments, while lions are adapted to living in hot, savanna environments.
2. Food: Different mammals have different diets. For example, herbivores eat plants, while carnivores eat animals. This means that mammals must live in habitats where they can find the food they need to survive.
3. Competition: Different mammals compete for resources such as food, water, and shelter. This competition can limit the number of mammals that can live in a particular habitat.
4. Disease: Different mammals are susceptible to different diseases. This means that mammals must live in habitats where they are not likely to come into contact with diseases that could kill them.
5. Human activity: Human activity can have a negative impact on mammal habitats. For example, deforestation can destroy the homes of mammals, while pollution can make it difficult for them to find food and water.