Which body is primarily concerned with labor relations and workplace rights?

The National Labor Relations Board (NLRB) is the primary federal agency responsible for overseeing labor relations and protecting the rights of employees in the workplace. It is tasked with enforcing the National Labor Relations Act (NLRA), which facilitates collective bargaining and aims to protect the rights of employees to organize and engage in collective activities for mutual aid and protection.

The NLRB addresses issues such as unfair labor practices, employee representation rights, and the processes surrounding union elections. This focus on labor relations and workplace rights distinguishes the NLRB from other federal agencies.

In contrast, the Department of Labor encompasses a broader range of responsibilities that relate to overall labor standards, wages, and employment laws but does not specifically manage labor relations in the same direct manner as the NLRB. The Securities and Exchange Commission focuses on the regulation of securities markets, and the Federal Aviation Administration is responsible for aviation safety. Therefore, the focus of the National Labor Relations Board on workplace rights and labor relations uniquely qualifies it as the correct answer.