Mammals have a layer of fat under the skin to help insulate the body.
Hair is used to insulate and keep the body warm in a large variety of climates.
Mammals have a layer of fat under the skin to help keep the body warm in a variety of climates.
Mammals have a layer of fat under the skin to help keep the body warm in what?
a) cozy cabins
b) by keeping them warm
c) warm areas
d) a variety of climates
e) In the winter
f) heat or cold
g) the environment
h) sunny places