According to the material, which statement about extrusion is true?

• A. Extrusion is possible for Edges and Faces
• B. Extrusion is possible for Vertices only
• C. Extrusion is possible only for Faces
• D. Extrusion is not possible for any mesh component

Answer: (C)

Extrusion works by pulling out a surface to create new geometry that stays attached to the original face. A face has area and a normal direction, which lets the tool generate new polygons connected to that face as you push it outward. Edges and vertices don’t define a surface to pull from, so there’s nothing to extrude in the same sense; you might transform them individually, but the standard extrusion operation is defined for faces. That’s why the true statement is that extrusion is possible only for faces. The other options imply extruding edges, vertices, or nothing at all, which don’t align with how extrusion is typically implemented.