1. Insulation: Hair acts as a barrier to help mammals regulate their body temperature. It traps a layer of warm air close to the skin, keeping the animal warm in cold environments. This is especially important for mammals living in colder climates.
2. Camouflage: The color and pattern of an animal's fur can help it blend in with its surroundings, making it harder for predators to spot them or for prey to notice them. This is a crucial survival strategy for many mammals.