To say that all African American males are fast runners is an example of

stereotyping. Stereotyping is the act of making assumptions about a group of people based on certain characteristics or traits that are believed to be common among them. In this case, assuming all African American males are fast runners based on their race and gender is not only inaccurate but also perpetuates harmful stereotypes that can lead to discrimination and prejudice. It is important to recognize the individuality and diversity within any group of people and avoid generalizing or making assumptions based on race or gender.