How were sit-ins a productive way to protest?

These groups became the grassroots organizers of future sit-ins at lunch counters, wade-ins at segregated swimming pools, and pray-ins at white-only churches. By sitting in protest at an all-white lunch counter in Greensboro, North Carolina, four college students sparked national interest in the push for civil rights.

(for the movement)

they protect them in many ways.

most build a museums

give the museums money to support and finace and advertise there relgion.

cultivate talents such as cultural relics management and cultural relic protection and restoration.