Final answer:
Rosa Parks boarded a bus at the Montgomery Fair department store, leading to her arrest and the initiation of the Montgomery Bus Boycott, a key event in the Civil Rights Movement.
Step-by-step explanation:
After a day at work at the Montgomery Fair department store, Rosa Parks boarded a bus. This act led to a significant event in the Civil Rights Movement, known as the Montgomery Bus Boycott. On December 1, 1955, Rosa Parks was arrested after refusing to give up her seat to a white person, which was a violation of the then-segregation laws of Montgomery, Alabama. This led the African American community to start the boycott, which was a pivotal movement against racial segregation. The boycott was supported and led by important Civil Rights figures such as Martin Luther King Jr. and lasted for 381 days. It eventually ended when the U.S. Supreme Court ruled that segregation on public buses was unconstitutional.