Freckles are an accumulation of melanin.

Name: Freckles are an accumulation of melanin.
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Quizplus · Accepted Answer

Freckles are indeed an accumulation of melanin, which are small areas of increased pigmentation on the skin. Melanin is produced by melanocytes, which are cells that produce color in the skin, hair, and eyes. When exposed to the sun, melanocytes produce more melanin, causing freckles to become darker.

Freckles Are an Accumulation of Melanin