Final answer:
Rosa Parks made a significant contribution to United States history by refusing to give up her seat on a segregated bus in Montgomery, Alabama.
Step-by-step explanation:
Significant Contribution to United States History: Rosa Parks
Rosa Parks, an African-American civil rights activist, made a significant contribution to United States history.
Her refusal to give up her seat on a segregated bus in Montgomery, Alabama in 1955 sparked the Montgomery Bus Boycott and became a pivotal moment in the civil rights movement.
Parks' act of defiance challenged the unjust racial segregation laws of the time and brought national attention to the racial inequality faced by African-Americans.
It inspired others to join the fight for civil rights and led to the successful desegregation of public transportation.
Her contribution was significant because it not only paved the way for other acts of civil disobedience, but also inspired a new wave of activism and resistance.
Parks became an icon of the civil rights movement, symbolizing the power of an individual to spark meaningful change.