by there warm fat
whales keep warm by their blubber! good question
The fur on their bodies keep them warm.
They don't need to keep warm, they have a double coat so they stay warm.
They urinate on their feet to keep warm.
The materials keep you warm by the fabric they are made out of!
heat keep us warm :)
they keep warm by sleeping in long grass.
what keep you warm in alska
Cats have fur to keep them warm when they are cold.
Animals need to keep warm, some keep warm by the fur that they have, penguins huddle up they make a circle 1 stands in the middle 2 keep warm then the next 1 goes and they keep going.
They do not HAVE to be warm. I keep mine under a light built into the lid to keep him warm. It is nice to keep your fish warm. It is very pleasant in winter. I would suggest a warmer.
they can cuddle their cubs too keep them warm.