How should brush pressure change while painting thin tree branches?

Correct answer: More at the start and less at the end

The governing idea is to match brush pressure with the natural taper of a branch. A branch begins thicker near the trunk and narrows toward its tip, so pressure should begin stronger and gradually decrease, making option A correct. Constant heavy pressure produces an unnatural thick mark, increasing pressure makes the tip wider, and irregular pressure removes control from the stroke.