Final answer:
Emmett Till's mother's decision to have an open casket for her son's funeral helped the civil rights movement by gaining sympathy and support, raising awareness globally, and sparking legal actions.
Step-by-step explanation:
Emmett Till's mother's decision to have an open casket for her son's funeral had a significant impact on the civil rights movement.
Firstly, it gained sympathy and support for the movement. By allowing the world to see the brutally beaten and disfigured body of her son, Mamie Till-Bradley evoked strong emotional reactions and outrage.
Secondly, it raised awareness globally. Photos of Emmett Till's mutilated face were published in newspapers all over the world, highlighting the extreme racial violence and injustice in the United States.
Lastly, it sparked legal actions. The public outcry over the acquittal of Till's murderers led to increased pressure for justice, eventually contributing to the passing of civil rights legislation