Question

skin helps regulate body temperature by
o the production of sweat.
o increasing the production of melanin.
o releasing sebum.
o all of these choices.

Explanation:

Skin regulates body temperature through sweating. When the body is too warm, sweat glands produce sweat which evaporates and cools the body. Sebum release is related to skin - oil balance and not temperature regulation. Melanin production is related to skin protection from UV - rays and not temperature regulation.

Answer:

the production of sweat.