<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
why are some people from africa so black?
<|assistant|>
Some people from Africa are so black because they have a high concentration of melanin. Melanin is a pigment that gives color to the skin and is responsible for natural sun protection. People with more melanin are generally darker-skinned, while people with less melanin are lighter-skinned.