Why is balance between repetition and variety of lines necessary?

So that the composition has order without becoming monotonous

The governing concept is visual rhythm balanced with variety. Repeating related lines can establish unity, direction, rhythm, and a sense of order, but excessive repetition may make the composition predictable or monotonous. Variety in length, direction, thickness, curvature, or spacing adds interest and helps distinguish parts, yet uncontrolled variety can make the picture appear restless and disorganized. Option A is correct because a thoughtful balance preserves structure while preventing boredom. Option B is not a purpose of balance, and options C and D describe undesirable results. The artist should repeat enough to connect the composition and vary enough to maintain attention and hierarchy.

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