insulator
Hair can be both a conductr and an insulator because whenu think about if you use a curlibg iron to curl your hair. heat is needed. To stay in the curls, hair must bg eboth a conductor and an isulator becasue otherwise hair would not be able t saty in this shape if heat was used to make this possible. The heat goesthrough the hair an dremains there for a while.
it depends on the kind of hair your talking about, because if your talking about arm and leg hair, it helps as an insulator because when the hairs stand up and goes back down it traps heat because in the moment that the hair is standing up the surface area increases and helps to store more heat. Now head hair on the other hand its just a thick mass of hair that helps with heat, think of it as a blanket for your head :)
Because you are in a cold environment. The hair rises so that it can trap air as an insulator to prevent heat loss from your body. I hope that helps!
Because it stands as a heat insulator during cold days.
insulator
It is an insulator.
its an insulator
insulator.
Insulator
Insulator
insulator