Rosa Parks was the prominent civil rights leader who played a key role in the Montgomery Bus Boycott of 1955. By refusing to give up her seat to a white passenger, Parks' act of civil disobedience became a catalyst for the movement against racial segregation in the United States. Her bravery and commitment to equality not only sparked significant protests but also highlighted the systemic injustices faced by African Americans. Parks' legacy endures as an embodiment of courage and a symbol of the ongoing struggle for civil rights.