What type of drawing focuses on the interior layout of a building?

The correct choice is a floor plan, which is specifically designed to provide a detailed view of the interior layout of a building. A floor plan illustrates the arrangement of rooms, walls, doors, windows, and other architectural features, allowing viewers to see how space is utilized within the building. It is typically drawn to scale and offers a bird's-eye view of a single level of the structure, making it an essential tool for architects, builders, and interior designers.

Other types of drawings serve different purposes. For instance, a section drawing provides a cut-through view of a building, revealing details of the construction and the relationship between different levels. A site plan illustrates the entire property layout, including the building's position relative to other structures, landscapes, and external features. An elevation drawing depicts the exterior view of a building, highlighting design details, heights, and façade features but does not convey interior configurations. Each drawing type serves a unique function in the process of architectural design and construction, but the floor plan is the primary representation of a building's interior layout.