What does the "Split Body" command do in Fusion 360?

The "Split Body" command in Fusion 360 is designed to divide a solid body into two or more separate bodies based on specified cutting tools or planes. When you use this command, you can create new bodies by cutting through an existing one, which allows for more complex designs and modifications. This is particularly useful in scenarios where you need to process or manipulate parts independently after the split, such as preparing components for manufacturing or assembly.

This functionality enhances design flexibility, as it allows engineers and designers to create intricate geometries by breaking down larger or more complex shapes into manageable parts without losing the original data of the solid body. In terms of interaction within the Fusion 360 interface, the command facilitates precision in design modification, enabling users to work effectively with overlapping features or complex assemblies.

The other options reflect different functions that do not align with the purpose of the "Split Body" command. The duplication of a solid, simplification of shapes, or merging multiple bodies are distinct commands in Fusion 360 that cater to different aspects of design manipulation. Thus, the answer highlighting the splitting of a solid body into separate entities accurately encapsulates the command’s core functionality.