Which option correctly matches shape boundary quality with the subject?

Soft boundary for smoke and clear boundary for traffic sign

A boundary is the edge that separates a shape from the surrounding space. Its quality should suit the character of the subject and the visual effect the artist wants. A clear, firm boundary works well for an object that must look definite and easily recognised, such as a traffic sign. A soft, broken, or less distinct boundary is more suitable for smoke, mist, clouds, or other subjects that appear to dissolve into the air. The boundary should therefore communicate the subject rather than be chosen without thought.

Choice A is correct because smoke is naturally diffuse, while a traffic sign needs a sharp and readable outline. A hard square would not communicate smoke well, and a blurred sign boundary could reduce its clarity and recognition. Using the same blurred edge for every subject or removing all boundaries would also weaken the ability of shapes to describe objects.

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