When the direction of the light source changes, what should the artist correct first?

Correct answer: The positions of the highlight and shadow

Direct answer: D, the positions of the highlight and shadow. A highlight is the area receiving the strongest light, while a shadow is the area receiving less light or being turned away from it. When the light source moves, the illuminated side changes first, and the cast or form shadows must be adjusted to agree with that new direction. If the artist leaves the old highlights and shadows in place, the object will look visually inconsistent, as if it were lit from two directions at once. A is unrelated because the paper’s name does not control lighting. B is unrelated because the colour wheel is a reference tool, not the light pattern on the object. C is unrelated because title length has no effect on shading. A useful habit is to mark the light direction with a small arrow before shading, then place the highlight and shadow consistently.