Which activist is known for founding the National Farm Workers Association?

Cesar Chavez is known for founding the National Farm Workers Association, which later became the United Farm Workers (UFW). His work in the 1960s and 1970s was pivotal in advocating for the rights of farmworkers, who often faced poor working conditions, low wages, and a lack of rights. Chavez organized strikes, boycotts, and marches to draw attention to these injustices and sought to empower farmworkers through collective bargaining and unionization. His commitment to nonviolent protest mirrored the tactics used by other civil rights leaders of the time, but his focus was specifically on the agricultural labor force in the United States, which set him apart as a significant figure in labor rights and Latino civil rights.

The other activists mentioned in the question are associated with different movements. Martin Luther King Jr. is known for his leadership in the civil rights movement advocating for racial equality. Rosa Parks is famously recognized for her role in the Montgomery Bus Boycott, which was also part of the civil rights movement. Frederick Douglass was a prominent abolitionist and advocate for the rights of African Americans in the 19th century. Thus, Chavez's specific focus on improving the lives of farmworkers highlights his unique contribution to labor activism.