What does the 'Mass' tool allow you to do in Revit?

The 'Mass' tool in Revit is specifically designed to create conceptual volumes that represent the overall massing of a building. This tool allows architects and designers to visualize and manipulate the basic forms of a structure without getting into intricate details at the initial stages of design. By focusing on massing, users can evaluate the spatial relationships and proportions of different building elements in a more abstract way. This capability is critical during the early design phases, where understanding the flow of space and light within the building can inform further detailed design decisions.

While the other choices mention important aspects of architectural design, they do not accurately capture the primary function of the 'Mass' tool. Creating detailed architectural elements is more about refined modeling, studying building performance metrics involves simulations and analyses that go beyond massing, and managing spatial relationships in 3D views typically utilizes other tools and functionalities within Revit. Hence, the focus on conceptual volumes in the context of physical massing correctly highlights the intended use of the 'Mass' tool.