Fur helps bears maintain homeostasis during winter by providing insulation to trap heat close to the body and prevent heat loss. This helps bears regulate their body temperature and stay warm in cold weather. Additionally, bears have a thick layer of fat (blubber) under their skin, which also helps to insulate their bodies and provide extra energy reserves during the winter months when food may be scarce. The combination of fur and fat allows bears to maintain a constant body temperature and survive in cold environments.
