Explanation: African Americans were only allowed to sit on the back of the bus, and if a white person wanted their seat, they had to give it up. Rosa Parks was on a seat one day, when a white person tried to take it from her. She refused to give it up and got arrested. A boycott was held because African Americans were tired of segregation. The boycott was effective since a lot of the passengers on the buses were black. With no money, the bus stations had to give in to the boycott.