Which habit is useful for reducing patches during colour filling?

Correct answer: Work continuously with a similar paint load

The governing concept is consistency of paint load and stroke rhythm. Using a similar amount of colour on each stroke and working continuously helps adjacent strokes merge before they dry, producing a more even surface. Therefore, option B is correct. Taking fresh colour every time can create variation, repeatedly drying the brush interrupts coverage, and folding paper does not solve patchiness. Pressure and speed should also remain reasonably steady.