The refusal to give up her bus seat refers to the act of Rosa Parks on December 1, 1955, when she declined to surrender her seat to a white passenger on a segregated bus in Montgomery, Alabama. This courageous act of defiance became a pivotal moment in the early Civil Rights Movement, symbolizing the struggle against racial segregation and injustice. Parks' refusal sparked the Montgomery Bus Boycott, a significant protest that highlighted the systemic discrimination faced by African Americans and mobilized the community for civil rights.