If middle values are missing in shading what type of correction is suitable?

Correct answer: Add gradual values between light and shadow

Direct answer: B is correct. Shading usually works through a value scale: a light area, several middle values, and a dark shadow. The middle values are the steps that connect light to dark. If they are missing, the object may look flat, cut out, or too harsh because the transition changes suddenly. Add lighter and darker mid-tones gradually, following the surface and the direction of the light. A is wrong because removing every shadow removes important information about form and light. C is wrong because making the darkest part darker increases a single extreme but does not fill the missing transition. D is unrelated to the visual problem. A useful check is to squint at the drawing: good shading should show a connected progression rather than only white and black patches. Memory cue: light–middle–dark is the basic three-part structure of form shading.