Why is variety needed in a line pattern?

It makes the design interesting

The governing concept is variety, which introduces controlled differences into a visual arrangement. In a line pattern, variation in length, direction, thickness, spacing, curvature, or repeated motif prevents the eye from seeing a monotonous row of identical marks. These differences create visual interest and can also establish emphasis, rhythm, and movement. Therefore option A is correct: variety makes the design more engaging while still allowing the parts to relate to one another. Option B is false because changing line qualities does not make the lines invisible. Option C is unrelated because variety modifies treatment rather than removing the subject. Option D describes a physical action that a pattern cannot perform. Variety should be controlled; too much unrelated difference may destroy unity, so good design balances variety with repetition and coherence.

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