Final answer:
Washington, DC was important to Martin Luther King because it served as the setting for significant events and demonstrations during the civil rights movement, including the 1963 March on Washington.
Step-by-step explanation:
Washington, DC was important to Martin Luther King because it served as the setting for significant events and demonstrations during the civil rights movement. One of the most famous events was the 1963 March on Washington, where King delivered his iconic "I Have a Dream" speech in front of the Lincoln Memorial. The march aimed to bring attention to the need for civil rights legislation and equal political and economic opportunities for African Americans.