Which pairing of lines provides visual stability?

• A. Vertical and horizontal lines
• B. Diagonals and curves
• C. Curved lines only
• D. Vertical lines only

Answer: (A)

Visual stability comes from an orderly, anchored framework. Vertical and horizontal lines form a grid of right angles that creates predictable alignment and a calm, balanced surface for the eye to rest on. Diagonals and curves, by contrast, introduce movement and energy, pulling attention and disrupting that sense of stillness. Curved lines alone emphasize flow and dynamism rather than a fixed anchor. Vertical lines alone feel solid, but pairing them with horizontals reinforces a grounded, stable structure.