Final answer:
Darker skin protects against UV light and folate deficiency, while lighter skin aids in Vitamin D synthesis in regions with weaker sunlight.
Explanation:
Darker skin provides protection against UV light and helps prevent folate deficiency, while lighter skin aids in Vitamin D synthesis in areas with weaker sunlight.
Natural selection favored dark skin in sunny regions to protect against UV radiation and folate loss, and lighter skin in less sunny areas to facilitate Vitamin D production.
Exposure to sun influences skin color adaptation, impacting protection from UV rays and Vitamin D levels based on the regional sunlight intensity.
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