Final answer:
In Fusion 360, merging bodies is done through the 'Combine' feature under the MODIFY menu, not through extrude, split, or chamfer; choose 'Join' as the operation after selecting the target and tool bodies.
Step-by-step explanation:
To combine bodies in Autodesk Fusion 360, you would use the Combine feature which can be found under the MODIFY menu. The correct answer to the question is C) Merge. To merge bodies in Fusion 360, you need to ensure that the bodies are in the same component and not joined or intersecting by any existing physical connection.
After activating the Combine tool, you select the Target Body and the Tool Bodies that you want to merge. Then, you choose the operation type as Join, ensuring that the 'Keep Tools' option is unchecked if you do not want to keep the original bodies as separate bodies after the operation. This effectively combines the selected bodies into one.