Final answer:
The United Farm Workers (UFW) union, led by Cesar Chavez and Dolores Huerta, was started to protect grape pickers in California by demanding fair employment contracts for agricultural laborers.
Step-by-step explanation:
The union that was started to protect the grape pickers in California was the United Farm Workers (UFW). The UFW was founded in 1962 by Cesar Chavez and Dolores Huerta, who were both Latino civil rights leaders. They fought for the rights of Mexican American agricultural laborers and organized migrant workers to demand fair employment contracts.
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