Question

select the word that means a refusal to buy or use something in order to bring about change. in the 1960s, filipino and latino farmworkers in california went on strike against large grape growers, demanding better working conditions, better pay, and union representation. union head césar chávez led the workers on a march to the state capital, and people across the country learned about the workers cause. in response, millions of americans stopped eating non-union grapes. eventually, the growers agreed to the workers demands. the combination of the farmworkers protests and the grape boycott had proved effective.

Explanation:

The question asks for a word meaning a refusal to buy or use something for change. The passage mentions "millions of Americans stopped eating non - union grapes" and refers to it as a "grape boycott". The word "boycott" means a refusal to buy or use a product (or service) to bring about a change, which matches the definition in the question.

Answer:

boycott