Yaks, polar bears and other mammals are able to survive in Earth's coldest habitats. Which statement explains how their bodies
maintain the free energy they require, even when the environmental temperature is very low?
A.
Layers of hair and fat radiate the thermal energy that their metabolism releases.
B.
Layers of hair and fat absorb the radiant energy of sunlight, even when that energy is minimal.
C. Layers of hair and fat trap the thermal energy that their metabolism releases.
D. Large body size increases the metabolic rate and generates more thermal energy.