Which of the following represents the space that is allocated solely for a tenant's exclusive use?

The correct choice highlights the concept of "Rentable Area," which refers to the total area that a tenant is obligated to pay rent for. This area typically encompasses the usable space that the tenant occupies as well as a proportional share of the building's common areas, but for the purpose of identifying the exclusive space of a tenant, it can also imply the designated parts of the space solely used by that tenant.

While the "Net Area" pertains to the actual space usable by a tenant, excluding common areas, and "Leasehold Area" refers to the area covered under a lease agreement, these terms don't distinctly emphasize the exclusive use factor as "Rentable Area" does. The "Service Area," on the other hand, is generally related to spaces used for building management and services, such as mechanical rooms, which are not used exclusively by the tenant.

Choosing "Rentable Area" captures the essence of the space allocated strictly for the tenant's exclusive use, making it the most appropriate answer.