Which correctly explains the relation between line weight and visual distance?

Darker lines for near objects and lighter lines for distant objects can increase depth

The governing concept is atmospheric or linear suggestion of depth. Artists often use stronger, darker, or heavier contours for nearer forms and lighter, thinner, or less emphatic marks for forms that recede. This difference does not create depth by itself in every situation, but it can support overlap, scale, placement, and atmospheric fading. Option A is correct because it carefully says that the relationship can increase depth rather than claiming it is an absolute rule. B reverses the usual visual cue, C incorrectly denies the effect of line weight, and D ignores the need for variation and other spatial clues. The answer therefore applies line weight as a relative visual signal.

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