What command is used to create a solid body from three sketched cross sections including two rectangles and a circle?

The Loft command is utilized to create a solid body from multiple cross-sectional sketches that are not necessarily aligned or the same shape. In this scenario, where you have three sketched cross sections—two rectangles and a circle—the Loft command allows you to seamlessly transition between these different profiles.

This command effectively generates a solid by connecting the edges of these sketches and forms a continuous body that retains the characteristics of all three sketches. It intelligently interprets the shapes to create a smooth gradient from one cross-section to the next, enabling complex designs that cannot be achieved with simpler commands.

In contrast, other commands like the Extrude command would require a single profile to create a solid by extending it linearly, while the Revolve command applies to profiles that are revolved around an axis to create cylindrical or spherical shapes. The Sweep command is generally used when you want to move a profile along a defined path. Thus, the Loft command is the most appropriate choice for creating a solid body from the specified cross sections in this scenario.