Dr. Chen is an evolutionary psychologist. He has observed that many Africans are lactose-intolerant. He notes that this might be because of adaptation, a key concept in the evolutionary perspective.

Selective    

Explanation:

  The selective adaption is one of the key concept of the evolutionary perspective that helps in influencing the given perspectives for producing the sensory adaption.

The evolutionary perspective is one of the type of natural selection process in terms of personality and the individual differences.  

According to the given scenario, Dr. Chen is known as evolutionary psychologist and due to selective adaption the Africans are more lactose intolerant. Therefore, Selective adaptation is the correct answer.

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