Which definition best describes a union?

The definition of a union as a formal association of workers promoting their interests is accurate because unions are established to represent the collective interests of their members in negotiations with employers. This typically includes bargaining for better wages, benefits, working conditions, and job security. Unions operate based on structured governance and adherence to specific regulations and procedures, which distinguishes them from informal groups or volunteer organizations. The formal nature of a union allows them to collectively represent their members in a legal capacity, engaging in contracts and negotiations that serve to enhance the working conditions and rights of employees.

In contrast, informal groups of employees might discuss shared interests but lack the formal structure and legal recognition that unions have. Volunteer organizations that support community issues do not focus on workplace negotiations but rather aim to address broader societal concerns. A regulatory body governing employee behavior would be concerned with compliance and standards rather than the collective interests of workers. Hence, the formal association aspect is crucial in understanding the role of unions in the workplace.