Question

multiple choice question
which of the following is a function of sebum?

coolant for the skin
protective pigmentation
part of the immune response
lubricant for the hair and skin

Explanation:

Sebum is an oily substance produced by sebaceous glands. It does not act as a skin coolant (that is the role of sweat), provide protective pigmentation (that is melanin's function), or directly participate in the immune response. Its core function is to moisturize and lubricate the skin and hair, preventing them from drying out.

Answer:

lubricant for the hair and skin