What type of estate grants the tenant the right to occupy another's fee simple estate?

A leasehold estate is correct in this context because it specifically describes an arrangement where a tenant is granted the right to occupy and use a property that belongs to another party, typically the landlord, who holds the fee simple estate. A leasehold estate is created through a lease agreement, which outlines the terms under which the tenant can occupy the property, including duration and rent.

In contrast, a life estate grants an individual the right to use and benefit from a property for their lifetime, after which the property reverts to the original owner or their heirs. A fee simple estate represents the highest form of ownership one can have in real estate, giving the owner full control over the property, subject to limitations like zoning laws or covenants. A proprietary estate, often associated with share ownership in a cooperative housing arrangement, doesn't directly convey the right to occupy a property in the same manner as a leasehold estate does. Thus, leasehold estates are the appropriate answer, as they clearly define the tenant's right to occupy another individual's fee simple estate.