A snail is the animal that can hibernate or sleep for 3 years. Hibernating is one way a snail can live through very dry weather conditions.
Because it is comfortable on your window. Leave ir alone.
Slowly.
No, they do not.
I have a large apple snail, about a baseball size. I feed it only with Romain lettuce. It survives well.
leaves!
leaves
Algae, so you don't really need to feed them as they "feed" themselves.
feed it
there in water
No, snakes do not normally lay their eggs when hibernating. They normally do so in late summer.
Bears hibernate in the winter (and sometimes late fall and early spring as well if it is cold enough), so that they can conserve energy while food is scarce. Bears are large creatures and it takes a lot of energy to hunt. By hibernating, bears use little energy while sleeping so that when spring comes they can feed on an abundance of prey and vegetation.