Answer :
Final answer:
Skin darkens in response to exposure to sunlight or sunlamps due to increased production of the pigment melanin. This is a protective response to absorb harmful UV rays and prevent damage to skin cells.
Explanation:
Exposure to sunlight or sunlamps can darken the skin due to the body's production of a pigment called melanin. When your skin is exposed to UV radiation, cells called melanocytes produce more melanin as a protective response. This melanin absorbs the harmful UV rays and prevents them from causing damage to the DNA in your skin cells. It's this increase in melanin production that results in a darker skin color, often experienced as a tan.
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