What movement sought to end racial discrimination in the United States?

The Civil Rights Movement is the correct choice because it was specifically aimed at ending racial discrimination and achieving equal rights for African Americans and other marginalized groups in the United States during the mid-20th century. Key figures like Martin Luther King Jr., Rosa Parks, and Malcolm X played pivotal roles in this movement, advocating against segregation and for voting rights, legal equality, and social justice.

The Suffrage Movement, while also focused on civil rights, primarily dealt with women’s right to vote rather than addressing racial discrimination directly. The Labor Movement concentrated on the rights and interests of workers, including wages and working conditions, which is distinct from the racial focus of the Civil Rights Movement. The Environmental Movement is centered around conserving natural resources and protecting the environment, which does not directly relate to issues of racial discrimination.