Which linear combination is suitable for making a tree trunk look realistic?

Irregular vertical grain lines with light-dark variation

The governing concept is expressive line used to suggest natural texture. Tree bark usually has vertical growth patterns, cracks, ridges, knots, and uneven tonal areas. A realistic drawing does not copy one repeated mark; it combines irregular lines with changes in pressure, length, spacing, and darkness. Option A is correct because vertical grain lines and light-dark variation suggest the rough, uneven surface and cylindrical direction of a trunk. Option B may create a dotted pattern but cannot show bark grain effectively. Option C gives only an outline and removes surface information. Option D ignores the usual vertical flow of bark and produces a mechanical appearance. Thus, varied linear treatment creates both texture and a sense of form.

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