Final answer:
A union shop requires employees to be members of the union, while an agency shop does not require membership but mandates payment to the union.
Step-by-step explanation:
In labor relations, a union shop is a workplace where all employees must belong to a labor union or pay union dues as a condition of employment. This means that even if an employee does not want to join the union, they still have to pay fees to support union activities. On the other hand, an agency shop is a workplace where employees are not required to join the union, but they must still pay union fees or a similar amount to the union as a condition of employment. The key difference between the two is that the union shop requires employees to be members of the union, while the agency shop does not require membership but still mandates payment to the union.
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