Final answer:
Collective bargaining and strikes are commonly used strategies to strengthen the labor movement, and examples include the United Auto Workers' negotiations with General Motors and their sit-down strike.
Step-by-step explanation:
One common strategy used to strengthen the labor movement is collective bargaining. This is a process where the labor union negotiates with the employer to reach an agreement on wages, working conditions, and benefits for the workers. For example, the United Auto Workers union engaged in collective bargaining with General Motors, leading to a union contract providing higher pay and benefits for employees.
Another strategy is the use of strikes. Strikes are organized work stoppages where workers refuse to work until their demands are met. A notable example is the sit-down strike by the United Auto Workers, where they occupied several General Motors factories until GM was forced to negotiate.
Furthermore, labor unions may also try to influence legislation to strengthen their bargaining position. They work to promote laws that protect workers' rights and improve working conditions. For instance, the American Federation of Labor-Congress of Industrial Organization (AFL-CIO) lobbies for labor-friendly policies and legislation.