A ________ is that portion of a building included between the upper surface of a floor and the upper surface of the floor or roof next above.

The term that correctly completes this definition is "story." In architectural terms, a story refers to the vertical division of a building, defined by the space between the upper surface of a floor and the upper surface of the floor or roof above it. Each story contributes to the overall height of the building and is typically counted from the ground up, distinguishing different levels within the structure.

A floor refers to the surface on which one stands or places objects; it is a component of a story but does not encompass the height or vertical space defined in the question.

Level generally indicates the relative position or elevation within the building but does not specifically refer to the space between two floors.

Surface refers to the outside layer or boundary of an object but does not pertain to the vertical scope of a building's structure.

Understanding the term "story" is essential in the context of building and construction, as it is fundamental to architectural design, building codes, and zoning regulations.