In which situation can very similar lines make a drawing dull?

When the same thickness and direction are used everywhere

Lines help organize a drawing and guide the viewer’s attention. Similar lines can create unity and rhythm, but using exactly the same thickness and direction everywhere may remove contrast and make the picture feel repetitive. Variation in thickness, length, direction, spacing, or character can create movement and visual interest. Good design usually balances unity with variety: the parts should belong together, but they should not all look mechanically identical.

Choice A is correct because repeating one thickness and one direction throughout the drawing can make it dull. Choice B describes purposeful variation, which normally adds interest rather than removing it. A clear main figure in C can strengthen communication, and lines forming a pattern in D may be attractive when the repetition is intentional and well arranged. The issue is not repetition itself; it is excessive, unvaried repetition without a visual purpose.

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