Mammals have a layer of fat under the skin to help insulate the body, and insulation is very important in a cold climate like Arkhangelsk. Given these facts, what aspect of mammals is especially important in cold climates among the following options: - layer of body fat under skin - lips - sweat glands - To conserve energy - toes - food and shelter - It helps them survive - by keeping them warm
The answer to this question is:
layer of body fat under skin