What can cause compositional balance to be disturbed through line?

An unbalanced group of very heavy and dense lines on one side

Compositional balance depends on how visual weight is distributed across the picture area. Thick, dark, dense, or numerous lines attract more attention than light, sparse marks. Option A is correct because concentrating such heavy line work on one side can make that side appear visually heavier and cause the composition to feel tilted or unstable. Option B describes an element that supports balance rather than disturbing it. A clear outline in C may define the subject and can be balanced through placement, while D explicitly provides balance through empty space. The governing idea is not that every line must be identical, but that line weight, density, direction, and position should work together across the whole composition.

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