Final answer:
Emmett Till was a young African American boy whose brutal murder in 1955 became a significant event in the Civil Rights Movement. His case exposed the racial violence and injustice faced by African Americans and mobilized support for civil rights.
Step-by-step explanation:
Emmett Till was a 14-year-old African American boy who was brutally murdered in 1955 for allegedly offending a white woman in a grocery store in Mississippi. His murder became a catalyst for the Civil Rights Movement as his mother, Mamie Bradley, insisted on an open-casket funeral to expose the brutal racism and hate crime her son had suffered. The publication of Till's mutilated face in newspapers across the country galvanized public outrage and mobilized both black and white individuals in the fight for civil rights.