What effect does gradual shading have on form?

Shows roundness and smoothness

The governing concept is gradual tonal transition in form drawing. When a light tone changes progressively through middle values into a darker tone, the eye reads the surface as turning rather than ending abruptly. This smooth transition is especially useful for rounded forms such as spheres, eggs, and cylinders because it suggests curvature, volume, and a continuous surface. Therefore, option C is correct. Shading cannot give a drawing sound, physically fold the paper, or remove the form. Abrupt changes may describe a sharp edge, but gradual changes are better for soft, rounded surfaces. The artist should follow the light direction and blend or layer values carefully.

This is a Class 9 Art Education question. Chapter: Drawing Basics. Topic: Pencil shading.