Which option shows a functional use of shape?

Using a clear geometric shape in a safety sign.

Functional design uses visual elements to communicate a practical message quickly and clearly. A safety sign must be recognized even when a person has very little time to read it, so a simple, bold, and familiar geometric shape helps communicate warning, direction, or prohibition. Option A is correct because the shape performs a useful communication function rather than serving only decoration. Option B describes accidental marks with no planned purpose. Option C removes the visual information needed for recognition, and option D concerns the sense of smell, not the functional role of shape in visual communication. Clear shape improves speed and accuracy of understanding.

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