What movement tried to end racial discrimination?

The Civil Rights Movement is the correct answer because it was specifically focused on ending racial discrimination and ensuring equal rights for all people, particularly African Americans, in the United States. This movement gained significant momentum during the 1950s and 1960s and addressed various forms of systemic racism, including segregation, discriminatory laws, and social injustices. Key figures, such as Martin Luther King Jr., Rosa Parks, and Malcolm X, played pivotal roles in advocating for equality and civil rights, employing tactics like nonviolent protests and legal challenges.

The other movements listed, while also significant in their respective contexts, do not primarily address racial discrimination. The Labor Movement focuses on workers' rights and economic issues, the Suffrage Movement aimed to secure voting rights for women, and the Environmental Movement centers on protecting the environment and addressing ecological concerns. Each of these movements has its distinct goals and impact, but none specifically targets the challenges of racial discrimination in the same direct manner as the Civil Rights Movement.