Which type of lines are more suitable to show the texture of a hard rock?

Irregular, angular, and rough lines

The governing concept is the correspondence between mark quality and surface texture. Hard rock commonly has an uneven, broken, cracked, or jagged appearance. Irregular angular and rough lines can imitate those changes in direction and surface disturbance, helping the viewer infer hardness and ruggedness. Therefore option A is the most suitable answer. Very soft rounded lines in option B would more naturally suggest smooth or delicate material, such as silk or a polished surface. Option C cannot communicate visible texture because invisible marks provide no visual evidence. Option D introduces a decorative repeated motif that does not normally describe rock. The artist should vary pressure, direction, length, and spacing to avoid a mechanically uniform result.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Texture.