Final answer:
Ella Baker titled her civil rights work "Bigger Than a Hamburger" to signal that the 1960s sit-ins were part of a larger fight for civil rights and social justice beyond just desegregating lunch counters.
Step-by-step explanation:
Ella Baker chose the title "Bigger Than a Hamburger" to emphasize that the sit-ins and other actions taken by civil rights activists during the 1960s were about much more than simply gaining the right to be served food alongside white customers. Baker sought to convey that the struggle was fundamentally about civil rights and social justice, and that these actions were part of a broader quest for equality and human dignity.
The sit-ins, led by college students and other activists, were not only about accessing services but also about challenging the pervasive systems of segregation and racism that affected all aspects of African American life.