An artist wants to change a broad band into a thin line at the end using a flat brush. Which combined change should be made?

Correct answer: Reduce pressure and turn the brush onto its edge

The governing concept is control of contact area through pressure and brush angle. A flat brush makes a broad band when much of its face touches the surface. To finish with a thin line, the artist should gradually reduce pressure and rotate the brush onto its narrow edge, reducing contact width. Thus option B is correct. More pressure or a flat position keeps the mark broad, while stopping or adding water does not create a controlled taper.