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.
Hibernation places the animal in a low energy state that eliminates the need for foraging/hunting during periods of extreme weather. This decreases the amount of time an organism is subjected
conditions where the energy required to maintain itself in a "waking state" would be very likely to result in death.
hibernation
While there are organisms that can live for long periods of time and organisms that can survive extreme conditions, there is no organism that is immortal. Unless God counts.
they survive in extreme conditions
Some organisms are better at adaptation to their environment because of their size, their diet, or any number of other reasons.
The term used to describe organisms that can survive in severe conditions is extremophiles. Extremophiles are able to thrive in environments with extreme temperatures, pH levels, salinity, pressure, or other challenging conditions that are typically uninhabitable for most forms of life. Examples of extremophiles include bacteria living in hot springs, organisms in deep-sea hydrothermal vents, and lichens in arid deserts.
survival of the fittest and hibernation.
Extreme temperatures
some can and some cannot
During the winter, food is too scarce for brown bears and black bears to survive. Hibernation is a state of extreme sleep where metabolism slows down. This reduces energy use and allows the animal to survive winter on its fat reserves alone.
Extremophiles belong to the kingdom Archaea. These organisms thrive in extreme environmental conditions such as high temperatures, acidity, or salinity, where most other life forms cannot survive.
A jaguar survives in extreme weather because of it's thick fur.
it is a behavioral adaptation because it is doing it EX. a bear hibernates :-)