Step-by-step explanation:
Hibernation is the state in which the animals become inactive and have metabolic depression in which the heartbeats, breathing and the metabolism slows down. Hibernation help the bear species survive in the changing seasons. The food is less available in the winter season and the undergoes hibernation.
When the bears hibernate, they enter a stage of deep sleep. The bears can survive as they live on the stored fat and the food. Thus, bears eat a lot in autumn in order to charge themselves which can be used while hibernation in winters.