Final answer:
The Mississippi Freedom Summer was the movement where college students volunteered in Mississippi in the summer with the goal of registering African Americans to vote.
Step-by-step explanation:
The movement where college students volunteered in Mississippi in the summer with the goal of registering African Americans to vote was called the Mississippi Freedom Summer. This movement took place in 1964 and involved black and white college students who worked to register black voters in the deep South, where many counties had black majorities but no registered black voters. Volunteers faced great personal risk, including harassment, violence, and even death, but their efforts played a significant role in challenging the disenfranchisement of African Americans in the region.