Answer:
It exemplify the concept of Stereotypes.
Step-by-step explanation:
Stereotypes is a situation where beliefs of a particular group of people are over generalized. It is the expectation people have about other group of people which could vary. For example, an expectation about the group's personality, preferences, or ability.
In the case of telling an African-American man that he is not like other black men exemplifies stereotypes about black men. That is, African-American men are ugly and not good looking generally.