If shading has only black and white, with no middle values, what will happen?

Correct answer: The transition between light and shadow will look harsh

Correct answer: A. Shading normally uses a range: highlight, light or middle value, and shadow. These intermediate values allow the eye to follow a gradual change across a rounded surface. If the artist uses only black and white, the change is abrupt, like a switch being turned on or off. Therefore the edge between light and shadow looks harsh, and the object may appear flat or cut into separate areas. Option B is wrong because softness and roundness need gradual middle tones. Option C is wrong because black-and-white shading does not make a surface transparent. Option D is wrong because colour temperature concerns warm or cool colour relationships, not the absence of tonal steps. Memory cue: more middle values make a smoother turn; only black and white make a hard jump.