What was one problem blacks faced while living in the south?

Lynching

Explanation:

Lynching refers to an extrajudicial (outside the law) killing by a particular group. Lynching in the United States was common before and after the American Civil War, particularly when directed towards black people. During the Reconstruction Era, lynching was one of the problems that black people faced in the South. This was exacerbated by the rise of racist groups such as the Ku Klux Klan. These were designed to scare black Americans and discourage them from voting, working and getting educated.

i'm pretty sure it would be, the mediterranean sea.