What type of drawing typically shows the vertical and horizontal relationships of a building?

A floor plan is the correct answer because it provides a detailed view of a building's layout from a top-down perspective. This type of drawing reveals the arrangement of rooms, walls, doors, and other elements within a single level of the building and illustrates the horizontal relationships between spaces. It serves as a foundational document in architectural design, guiding everything from construction to furniture placement.

Additionally, while the other types of drawings serve important purposes, they do not specifically focus on both vertical and horizontal relationships to the same extent as a floor plan does. A site plan depicts the building's positioning in relation to the surrounding environment but lacks the internal detail of room layouts. Elevation drawings show the exterior views of the building from various angles, emphasizing height and vertical design elements without addressing internal spatial relationships. Section drawings provide insight into vertical dimensions and are valuable for understanding the internal structure and relationships between different levels of the building, but they do not convey the horizontal layout. Hence, a floor plan is uniquely equipped to showcase the critical relationships of spaces on a single horizontal plane.