Labor unions are most closely tied to which type of productive resource? Choose one answer.

A.
entrepreneurship

B.
natural resources

C.
capital resources

D.
human resources

D. human resources

The correct answer is D. human resources. Labor unions primarily represent and advocate for the rights and interests of workers, who are a part of the human resources category. Labor unions negotiate with employers on matters such as wages, benefits, working conditions, and employment contracts. By promoting fair treatment and protecting the rights of workers, labor unions aim to improve the overall wellbeing and job security of employees. To arrive at this answer, you could have considered the role of labor unions and their primary focus on working conditions and worker's rights.

D. human resources