Which cue is most useful to show a cube as a form?

Showing different faces and edges

The governing concept is the visual construction of a solid through planes and boundaries. A cube reads as a three-dimensional form when the drawing shows more than one face and relates those faces through visible edges. Depending on viewpoint, the front, side, and top planes may appear, with perspective or parallel alignment helping establish orientation and depth. Option D is correct because different faces and edges provide direct evidence of the cube’s spatial structure. Option A represents a curved shape rather than a cube, option B removes the boundaries needed to understand its planes, and option C has no connection with visual form. Accurate proportion and value differences can strengthen the result, but the essential cue is the clear presentation of multiple faces and edges.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Form.