How can stippling and dry brush be combined to show depth in texture?

Correct answer: By using dense dots in dark areas and light dry-brush marks on raised areas

Texture and depth are suggested by contrast in value and mark quality. Dense stippling groups many dots in recessed or shadowed areas, making them appear darker, while restrained dry-brush marks can catch the surface and describe raised parts with broken highlights. Therefore option D is correct. Erasing, using one flat colour or repeating identical lines removes the needed variation.