What feature allows you to create a solid from a 2D profile?

The ability to create a solid from a 2D profile is primarily accomplished through the Extrude feature. When you have a 2D sketch, you can select it and use the Extrude operation to extend the profile into the third dimension, effectively turning it into a solid object. This process involves specifying how far the profile will be pushed or pulled, creating a solid body that maintains the shape of the original profile.

Revolve, Loft, and Sweep are all features that also create solids, but they do so in different ways. Revolve generates a solid by rotating a profile around an axis, which changes the context of how the profile is shaped into 3D space. Loft allows you to create a solid shape that transitions between multiple profiles, which is useful for more complex shapes that cannot be easily achieved by simple extrusion. Sweep creates a solid by moving a 2D profile along a defined path, giving it another layer of complexity and control over the resulting shape.

In summary, while each of these features contributes to solid modeling in distinctive ways, the specific operation for straightforwardly transforming a 2D profile into a solid is best represented by the Extrude function.