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Humans that produced less melanin became more common as populations migrated away from the equator.
Humans that produced less melanin became more common as populations migrated away from the equator.

Humans that produced less melanin became more common as populations migrated toward the equator.
Humans that produced less melanin became more common as populations migrated toward the equator.

Humans that produced more melanin became more common as populations migrated away from the equator.
Humans that produced more melanin became more common as populations migrated away from the equator.

Humans that produced more melanin became more common as populations migrated toward the equator.
Humans that produced more melanin became more common as populations migrated toward the equator.
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1 answer
The correct response is:
Humans that produced less melanin became more common as populations migrated away from the equator.
This is because, in regions with less sunlight (away from the equator), lower levels of melanin are advantageous for synthesizing vitamin D through sunlight exposure. Conversely, higher melanin levels are more common in populations near the equator, where increased UV radiation requires greater protection against skin damage.
