Which brush handling is most suitable for showing trees bending in strong wind?

Correct answer: Direct most strokes along the direction of the wind

The governing concept is directional brushwork: repeated marks arranged along one dominant direction can suggest force and movement. If most strokes flow with the wind, the bending trunks, branches, and leaves appear to be pushed by it, so option D is correct. Vertical strokes would contradict the movement, while dots or uniform trunk thickness do not by themselves communicate wind direction or bending.