The answer is further away.
1. A complicated population history, drastic differences in nutrition, and exposure to infectious diseases, which result in high levels of genetic and phenotypic variation in African populations, make Africa an attractive site for studies on human genetic diversity. According to founder effects, the Out of Africa hypotheses, some of which are genetic bottlenecks faced by dispersing humans, should lower genetic variety, are supported by the loss in genetic diversity with distance from Africa. Thus, the response is accurate.
2. The two eminent naturalists Comte de Buffon and Johann Blumenbach asserted that although all individuals have a common ancestor, environmental variables may cause biological variations among various human populations (races).
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