Which of the following is NOT a common property of lines in art?

• A. They convey direction and movement.
• B. They inherently provide mass to a composition.
• C. They vary in width to create emphasis.
• D. They define shapes and boundaries.

Answer: (B)

Lines in art primarily guide the viewer’s eye and convey energy. A line’s direction can steer movement across the page, with diagonal or curved paths suggesting action and flow. Varying the line’s width creates emphasis, making some paths feel more prominent or dynamic than others. Lines also define shapes and boundaries, outlining edges and separating one form from another.

Mass, on the other hand, refers to the perceived volume or bulk of a form. That sense of heaviness or solidity comes from how light and shadow model the form—through shading, value contrasts, and perspective—rather than from the line itself. A boundary line might enclose a shape, but the line alone doesn’t give that shape physical mass; it’s the modeling and tonal treatment inside and around the boundary that communicate volume. So, while lines are essential for directing attention and delineating edges, they do not inherently provide mass to a composition.