Question

what was a main tool used by the united farm workers in the 1960s to raise awareness about the plight of migrant farm workers?
boycotts
taking over federal buildings
violent protests
preservation of cultural areas

Explanation:

The United Farm Workers (UFW), led by figures like Cesar Chavez, strategically used boycotts (most notably grape and lettuce boycotts) in the 1960s. These nonviolent, large-scale boycotts targeted consumer goods to draw national attention to the poor working conditions, low wages, and exploitation of migrant farm workers. The other options do not align with the UFW's primary tactics: they did not take over federal buildings, avoided violent protests, and cultural preservation was not a core awareness-raising tool for this specific cause.

Answer:

boycotts