How does hibernation help organisms survive extreme conditions?

It allows them to go into a deep sleep so they use a minimal amount of energy. Then when there is more available food, they come out of their hibernation and start  feeding to regain their energy reserves to do it again the next winter.
It allows them to go into a deep sleep so they use a minimal amount of energy. Then when there is more available food, they come out of their hibernation and start  feeding to regain their energy reserves to do it again the next winter.