What does the "Fillet" command do in Fusion 360?

The "Fillet" command in Fusion 360 is used to create a rounded corner or edge on a selected shape. This helps in smoothing out sharp corners, which can enhance both the aesthetic appearance and functional performance of a part. By rounding edges, fillets can help reduce stress concentrations, making parts more robust in applications where they may experience significant forces or wear.

This command is particularly useful in both 2D and 3D modeling, allowing designers to create smoother contours that can improve the manufacturability of parts and contribute to better flow in liquid or air dynamics, depending on the application.

In the context of the other options, creating a hole in a solid, connecting two non-parallel lines, and reducing the surface area of a component do not accurately represent the primary function of the Fillet command. Each of these tasks involves different modeling commands within Fusion 360, such as the Hole command for creating holes or the Trim command for connecting lines.