anthro 101 writing prompt has to be 500 words prompt is below

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The phases of human development are biologically defined. How, if at all, can they also be culturally defined?

Discuss how natural selection has likely influenced the evolution of skin color in humans.

How is “race” a culturally constructed category and not a biological one?

this has to be 500 words or more and has to be in YOUR OWN WORDS. thank you.