Based upon this very short excerpt, I'd say it develops an atmosphere of chaos.
The answer is:
It establishes that African Americans are willing to suffer to achieve their rights.
It shows that ordinary African Americans were glad to participate in the movement.
Martin Luther King Jr. quotes Mother Pollard's words to demonstrate African Americans' willpower and eagerness to fight for their rights. During the Montgomery Bus Boycott in the 1950s, Mother Pollard refused to take the bus in spite of her old age and was a treasured influence to King.
An example of a courageous person would be someone who is not afraid to do something to help someone else.
