Why are different values given to different faces of a cube to make it look real?

Correct answer: To show the direction of the faces and the light

Answer: A, to show the direction of the faces and the light. Value means how light or dark an area appears. A cube has flat faces turned in different directions, so the same light does not reach every face equally. The face turned toward the light is usually lighter, the side face may be a middle value, and the face turned away may be darker. These changes help the eye understand the cube’s planes, position, and three-dimensional form. A is correct because differences in value describe both the direction of the surfaces and the light falling on them. B is wrong because value does not rename a colour; it changes its lightness or darkness. C is wrong because shading does not erase lines. D is wrong because value is a drawing method, not a way of physically folding paper. Memory cue: light side, middle side, dark side help a flat drawing look solid.