Final answer:
A lease agreement that is automatically renewed at the end of a 12-month period is known as a month-to-month lease.
Step-by-step explanation:
The student is asking about a lease agreement that is automatically renewed at the end of a 12-month period. This type of lease is known as a month-to-month lease. In a month-to-month lease, the tenant continues to rent the property on a month-to-month basis until either party provides a 30-day written notice to terminate the lease. This arrangement allows flexibility for both the landlord and the tenant.