Answer:
The correct answer is E. all of the above
Explanation:
Hairs of different mammals are modified to perform different functions like many mammals use hair to camouflage from predators, for example, snowshoe hare has white hair when winter comes which helps them to camouflage in the snow to protect itself from predators.
Hair can be modified to play a role in defense like in case of porcupine hair are converted in sharp quills, hairs can also perform the sensory function like sensory whiskers in mammals.
Long hairs are present in mammals that live in cold climates like polar regions which helps in trapping the heat of the body so they provide insulation to them. So the right answer is E.