What is the function of the "HATCH" command in AutoCAD?

The "HATCH" command in AutoCAD serves the essential function of adding pattern fills to enclosed areas within a drawing. This is particularly useful for visually distinguishing different sections of a design or indicating various materials and components. By applying hatching, users can enhance their drawings with texture and depth, making them easier to interpret and more visually appealing.

When an enclosed area is selected, the HATCH command allows the user to choose from various patterns, solid fills, or gradients, providing flexibility and customization to suit specific needs in architectural, engineering, or design projects. This capability is crucial as it aids in the creation of detailed and informative drawings that communicate complex ideas clearly.

The other options do not correctly describe the HATCH command's purpose, as it is not focused on 3D modeling, editing text annotations, or grouping objects, but specifically on the application of fill patterns to enhance visual communication in 2D representations.