Which Labor Law legalized unions and allowed several activities like going on strike?

The correct answer to the question is the Wagner Act, which is formally known as the National Labor Relations Act (NLRA). This legislation, enacted in 1935, played a crucial role in establishing the rights of workers to form unions and engage in collective bargaining. It specifically protected employees' rights to organize and participate in union activities without fear of retaliation from employers. The Wagner Act facilitated the process for workers to engage in strikes and other forms of collective action, thereby strengthening the labor movement in the United States.

This act set the framework for labor relations in the country, ensuring that workers could negotiate for better wages, working conditions, and rights as a collective body. The National Labor Relations Board (NLRB) was also established under this act to oversee the enforcement of labor laws, further ensuring that the rights granted to workers were upheld.

While the Norris-LaGuardia Act, which was passed in 1932, was significant in limiting the power of federal courts to issue injunctions against non-violent labor disputes and was an important step towards labor rights, it did not specifically legalize unions as robustly as the Wagner Act did. As such, the Wagner Act is often highlighted as the key legislation that legalized unions and allowed actions like strikes.