Answer to your question is D
Its the epidermis because it is subdivided into two layers.
Fur has a thick layer of protection to help protect..say a bear in this case. A polar bear's fur is helpful in the cold, to prevent the bear from freezing to death.
But since a polar bear eats fish and things that it's used to in Antarctica, it probably won't adapt as easily.
I hope I helped!
Mitochondria produce ATP, energy that is vital in aerobic cells. Therefore, I believe this is why they can be considered as power plants.
