What function of the skin does melanin serve against UV light?

Melanin is a pigment produced by melanocytes in the skin, and its primary role in relation to ultraviolet (UV) light is protective. When skin is exposed to UV radiation from the sun, melanin absorbs and dissipates this energy, reducing the likelihood of DNA damage in skin cells that can lead to cancer. This protective function helps shield the deeper layers of the skin as well and decreases the risk of sunburn, which is an immediate effect of UV exposure.

The presence of melanin is crucial in the skin's defense mechanism against the harmful effects of UV radiation, making it an important aspect of skin health and integrity. Skin with higher melanin content typically exhibits a lower incidence of skin damage and related pathologies from UV exposure. This is why the answer correctly emphasizes the protective role of melanin against UV light.