Final answer:
The term for a policy that requires an employee to take leave and substitutes another employee is called job rotation policy.
Step-by-step explanation:
The term for a policy that requires an employee to take leave from the job and substitutes another employee in his or her place is job rotation policy.
This policy allows for the temporary replacement of an employee who takes leave, ensuring that the responsibilities and tasks are still fulfilled during their absence. For example, in a retail store, if an employee goes on vacation, another employee may be assigned to take over their duties for that period.