If different values are applied to the three visible faces of a cube, what effect is created?

A three-dimensional effect

The governing concept is value, meaning the lightness or darkness of a colour or tone. When the three visible faces of a cube receive different values, one face may appear lighter, another middle-toned, and another darker. This variation suggests the direction of light and separates the planes, making the flat drawing look solid and three-dimensional. Therefore option D is correct. A decorative border is created by an outline, not by value differences. Warm colour concerns colour temperature rather than light and shade. Value changes do not make visual texture disappear; they mainly communicate form, depth, and illumination. The principle applies to cubes and many other objects because tonal contrast helps the viewer perceive volume.

This is a Class 10 Art Education question. Chapter: Fundamentals of Visual Arts. Topic: Elements of Art.