Which poster-colour technique is more effective for showing wood texture?

Correct answer: Controlled fibrous dry-brush strokes over a base colour

The governing concept is texture created through directional marks. A lightly loaded dry brush skips across the base colour and produces broken, fibrous strokes that can resemble wood grain. The strokes should follow the direction of the imagined fibres, with variation in length and pressure for a natural appearance. A uniform white layer hides texture, round dots do not suggest grain, and flooding with water weakens controlled marks. Therefore, option A is most effective.