Their fur
to keep them self's warm and
to keep it warm
They kept warm by hunting, and getting the fur of the animal (if their is any).
The pigeons are a warmblooded animal . the warm blooded animal eat more food to keep its body temperature balance with atmospheric temperature . most of the birds are warm blooded animal .
Well to keep their baby warm if it is having a baby but if not then to kepp it`s self warm!
An animal's fur can keep it both cool and warm depending on the season. The fur keeps the cool/warm air between the animal's skin and the outside air.
You could turn on the heater or cover yourself with a blanket.
its just like saying how does a thicker wooly jumper keep you warm there is not really any other way to explain it
they wear animal skins to keep them warm!
butterflies do not need to keep warm because they migrate to stay warm.
each animal has a unique way of adapting it self to its environment. the type of adaption depends on the environment.ex:all animals in the poles have thick fur and lot of fat to keep them warm.
They lived in caves, had fire, and wore animal skins as clothes.