Why should excess colour be removed from the brush before filling?

Correct answer: To prevent dripping and blotches

The governing concept is controlling the brush load. If the brush carries too much wet colour, paint may drip, pool at one point, or leave blotches instead of an even layer. Removing the excess before touching the paper makes the stroke more predictable, so option A is correct. It does not shorten the brush, fold the paper, or alter the name of the colour. Controlled loading supports neat filling.