Skin color, which has been used extensively in racial classifications, has been shown to be responsive to different environmental factors, making it of little use in categorizing humans into races. Some of the environmental factors that in?fluence skin pigmentation include:

Question

Quizplus · Accepted Answer

Skin pigmentation is influenced by the amount of ultraviolet radiation and cold, with darker skin providing more protection against harmful UV rays and lighter skin allowing for more vitamin D synthesis in areas with less sun exposure. The other options, such as diet and natural camouflage, have not been shown to have a significant impact on skin color. Iron and zinc compounds in soil can affect the nutrient content of plants, but there is no evidence linking them to human skin pigmentation.

Skin Color, Which Has Been Used Extensively in Racial Classifications