Which parameter controls the computation height?

The correct choice regarding the parameter that controls the computation height is the Level. In Revit, Levels are fundamental elements used to define vertical heights in the model. They serve as reference planes that set the height at which elements like floors and ceilings are placed. Each Level is associated with a specific elevation, and when you use Levels, any corresponding elements are automatically adjusted to align with the specified heights.

Levels are essential for creating a multi-story building and help maintain consistency throughout the design process. They also facilitate the generation of sections and elevation views, allowing for a clear understanding of how elements relate to one another spatially.

The height parameter might be relevant for specific elements, but it isn't a primary driving factor in the overall computation of height across the model; it's more about individual component dimensions. Elevation is typically used to describe the vertical location of an object but does not inherently provide the reference structure needed for overall height calculations like Levels do. Finally, Floor level relates specifically to the planes that define floor heights, which are informed by the Levels, thus further emphasizing why Levels are the foundational element used for height computation in Revit.