Question

what group/individuals sought to improve the treatment of migrant workers through boycotts and strikes?
immigration union,
dolores huerta & cesar
chavez
black panthers, newton
united farm workers
union, dolores huerta &
cesar chavez
sncc, martin luther
king

Explanation:

Dolores Huerta and Cesar Chavez were key figures in the United Farm Workers Union. They used boycotts and strikes to advocate for better treatment of migrant workers. The United Farm Workers Union, with Cesar Chavez and Dolores Huerta at the forefront, was specifically focused on the rights and treatment of migrant workers. The other groups/individuals (Immigration Union - likely a misnomer, Black Panthers focused on African - American rights, SNCC on civil rights in general) were not primarily focused on migrant worker rights.

Answer:

United Farm Workers Union, Dolores Huerta & Cesar Chavez.