Why is shading used to show form?

Correct answer: Because it gives a sense of depth and volume

Shading means placing lighter, middle, and darker areas on a drawing. These changes show how light falls on an object and where the surface turns away from the light. As a result, a flat circle may appear like a round ball, and a flat rectangle may appear like a solid box. Shading therefore helps the viewer understand depth, thickness, and volume, which together make form look real.

Option A is correct because depth and volume are the main effects of careful shading. A shaded object does not merely receive a different name or produce sound; shading is a visual method used with pencil, charcoal, paint, or another medium. It also does not cut paper. The light-dark arrangement gives clues about the object’s curved or solid structure, so shading is closely connected with showing form.