Final answer:
Cesar Chavez and Dolores Huerta formed the United Farm Workers (UFW) to unionize labor on California grape farms and improve conditions for agricultural workers, leading to successful contracts with grape growers in 1970.
Step-by-step explanation:
Cesar Chavez fought for the unionization of labor in California grape farms and formed the United Farm Workers (UFW) to bring workers together. Chavez, drawing from his own experiences as the son of a migrant farm family, recognized the plight of agricultural workers. Together with Dolores Huerta, they founded the UFW, which used tactics such as strikes and consumer boycotts to fight for fair employment contracts and better working conditions for farm laborers.
Chavez and Huerta's participation in the labor movement made a significant impact. The UFW's efforts, alongside those of Filipino farm workers, culminated in a historic boycott of California grapes. By 1970, the perseverance of these labor activists persuaded several grape growers to acknowledge the union and their laborers' rights, leading to the signing of contracts that included improvements in pay and benefits.