Rosa Parks's arrest for defying segregation laws in 1955 directly resulted in:

Rosa Parks's defiance of segregation laws in 1955 led to the Montgomery Bus Boycott, a significant event in the Civil Rights Movement. The boycott led to a ruling that the Montgomery segregation ordinance was unconstitutional.

Explanation:

Rosa Parks's arrest for defying segregation laws in 1955 directly resulted in the Montgomery Bus Boycott. This was a pivotal event in the battle against racial segregation in the United States. On December 1, 1955, Rosa Parks refused to give up her seat to a White passenger on a bus in Montgomery, Alabama, and was subsequently arrested. This act of defiance against the unjust segregation laws led to a large-scale boycott of the city's public transportation.

To support Rosa Parks, the Women's Political Council, a group of African American female activists, organized this boycott. The boycott was widely successful, and 40,000 African American riders did not take the bus on December 5, the first day of the boycott. The boycott was maintained for 381 days, during which Black residents refrained from using the city's buses and instead used alternate modes of transport such as carpools and taxis.

In June 1956, an Alabama federal court ruled that the Montgomery segregation ordinance was unconstitutional. The Supreme Court upheld this decision, leading to the desegregation of the city's buses. Rosa Parks's arrest thus directly led to the successful Montgomery Bus Boycott and a significant victory in the broader Civil Rights Movement.

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