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.

first of all, it's important to say that the book we shall not be moved, written by joan dash, is about the first strike of women in the united states in the year 1909. the best historical detail to clarify the reader's undertanding is the phrase "general strike". this strike involved women working at a garment factory who decided to protest   long working hours, low wages and brutal conditions. this strike became known as "the new york shirtwaist strike" or "the uprising of the 20,000". the strike mostly involved jewish women who did not speak english or who had a basic knowledge of the english language. finally, the strike went on from november 1909 until february 1910.