Final answer:
Martin Luther King Jr. led significant nonviolent protests including the Montgomery Bus Boycott in 1955, the March on Washington in 1963 where he delivered the 'I Have a Dream' speech, and the marches from Selma to Montgomery in 1965, all of which contributed greatly to the progress of the Civil Rights Movement.
Step-by-step explanation:
Martin Luther King Jr. was a pivotal figure in the American Civil Rights Movement, delivering speeches and leading nonviolent protests and marches to combat racial inequality. Among his many efforts, the Montgomery Bus Boycott in 1955, the Birmingham campaign in 1963, the March on Washington on August 28, 1963, and the 1965 march from Selma to Montgomery were significant events that highlighted the struggle for civil rights and brought national attention to the movement.
The Montgomery Bus Boycott, which began after Rosa Parks was arrested for refusing to give up her seat to a white passenger, lasted over a year and resulted in the Supreme Court ruling that segregated buses were unconstitutional. The March on Washington for Jobs and Freedom was a monumental event during which King delivered his iconic "I Have a Dream" speech. In response to violent opposition faced by civil rights demonstrators, most notably in Birmingham, Alabama, King's nonviolent strategy highlighted the brutality of Jim Crow laws and systemic racism, pressuring legislators to act on civil rights.