Answer:
A. Blood Vessels
Explanation:
Well let's kick out the obvious
C. Hair doesn't transport nutriets and isn't much help with thermoregulation
D. Muscles aren't in the skin, they're right below it
F. Nerves don't do anything with nutrients
E. Sweat Glands don't transport nutrients but they do help with thermoregulation but it was a close one
B. Oil Glands help with protecting not nutrients
The answer is A because
1. Blood cells carry nutrients to tissues, and since blood also carries heat the blood vessels expand when it's hot so all the blood goes to the limbs and then the sweat carries the heat from the blood, or when it's cold the vessels contract so it doesn't try to lose heat from the blood.
