Hibernation is used for conserving energy by some animals.
Bears use the fat as energy over the winter hibernation.
Bears hibernate to conserve energy.
Why do bears hibernate?
Options:
(1) use greater resources
(2) one celled organisms
(3) they are lazy
(4) conserve energy
(5) When it's cold
(6) hard outer covering
(7) hydration
(8) more sleep