Based on the descriptions provided, here are the key figures and their contributions toward civil rights for Black Americans:
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Rosa Parks - Refused to give up her seat for a White American on a Montgomery, Alabama bus, initiating a yearlong boycott that ultimately led to the end of segregation on public transportation in Alabama. Her actions are often viewed as a pivotal moment in the Civil Rights Movement.
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Martin Luther King Jr. - Led the Montgomery Bus Boycott and delivered a famous speech during the March on Washington for Jobs and Freedom, applying political pressure that helped lead to the passage of the Civil Rights Act of 1964 and the Voting Rights Act of 1965.
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A. Phillip Randolph - Organized a march on Washington to compel President Franklin Delano Roosevelt to permit Black Americans' participation in the defense industry, showing early advocacy for civil rights even before the height of the Civil Rights Movement.
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Franklin Delano Roosevelt - Passed Executive Order 8802, which prohibited racial discrimination in the defense industry and allowed Black Americans to gain employment in that field.
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Emmett Till - While his tragic murder catalyzed the Civil Rights Movement and raised awareness about racial violence, it was his death rather than actions he took that influenced the movement.
Given that the prompt suggests different figures’ roles, the best chart would highlight Rosa Parks, Martin Luther King Jr., and A. Phillip Randolph, as they directly contributed to civil rights activism and policy changes. Emmett Till serves as a symbol of the movement's brutality, while Franklin Delano Roosevelt's actions were significant to some extent within the broader context of civil rights for Black Americans.
Thus, the most appropriate choice from the descriptions is:
Key Figure: Rosa Parks Description: Refused to give up her seat for a White American on a Montgomery, Alabama bus initiating a yearlong boycott that led to the end of segregation of public transportation in Alabama
Key Figure: Martin Luther King Jr. Description: Led the Montgomery Bus Boycott and gave a speech during the March on Washington for Jobs and Freedom that applied political pressure to pass the Civil Rights Act of 1964 and Voting Rights Act of 1965
Key Figure: A. Phillip Randolph Description: Organized a march on Washington to force President Franklin Delano Roosevelt to allow Black Americans to participate in the defense industry
This overview would best represent the key contributors to the Civil Rights Movement.