Question

which of the following substances protects the skin from ultraviolet radiation? melanin sebum keratin perspiration

Explanation:

Melanin is a pigment produced by melanocytes in the skin. It absorbs ultraviolet (UV) radiation, preventing it from damaging the DNA in skin cells and reducing the risk of sunburn, skin aging, and skin cancer. Sebum is an oily substance that lubricates the skin and hair. Keratin is a protein that provides structural strength to the skin, hair, and nails. Perspiration (sweat) helps regulate body temperature and excrete waste products.

Answer:

Melanin