What mainly changes in a stroke when the brush is held at different angles?

Correct answer: The stroke width and texture change

The governing concept is the relationship between brush angle and bristle contact. Holding the brush upright usually allows a smaller contact area and a finer mark, while lowering or tilting it can spread more bristles across the surface, producing a broader or different-textured stroke. The colour name, paper size, and actual brush weight do not change because of the angle. Therefore, option B is correct.