Which basic design principle is primarily made up of lines?

• A. Shape
• B. Form
• C. Texture
• D. Color

Answer: (A)

Lines create the edges that define a two-dimensional area. A shape is the flat form formed when a line encloses space, so it relies on the boundary that lines provide. That’s why this principle is about shape. Form adds depth and volume, usually through shading rather than just an outline. Texture describes surface quality, which can be implied by lines but isn’t defined by a boundary. Color is about hue and value and can exist inside or outside a line boundary. By focusing on lines that outline an area, shape is the concept primarily made up of lines.