You could turn on the heater or cover yourself with a blanket.
Their fur
to keep them self's warm and
Well to keep their baby warm if it is having a baby but if not then to kepp it`s self warm!
butterflies do not need to keep warm because they migrate to stay warm.
They eat a lot so their body gets a thick layer of fat that blocks the cold from entering.
whales keep warm by their blubber! good question
They don't need to keep warm, they have a double coat so they stay warm.
The fur on their bodies keep them warm.
They urinate on their feet to keep warm.
heat keep us warm :)
The materials keep you warm by the fabric they are made out of!
what keep you warm in alska