What should be done to create a light tone in pencil shading?

Correct answer: Apply light pressure

The governing concept is graphite control through pressure. Light pressure deposits a smaller amount of graphite on the paper, so the resulting value remains pale and can be adjusted gradually. Thus option A is correct. Heavy pressure, repeated rubbing, or intentionally dark strokes place more graphite in the same area and create a darker, less flexible mark. Begin lightly and build tone only where necessary.