Which sequence is more suitable for creating a luminous effect in watercolour?

Correct answer: Begin with light transparent layers and gradually add darker values

Watercolour luminosity depends mainly on transparent washes allowing the white paper to reflect light. The sound sequence is to begin with pale, diluted layers, preserve the intended highlights, and gradually build darker values as the paper dries. Starting with dark paint limits later corrections, while adding opaque white or white to every layer can make colours chalky and dull. Thus option B follows the essential light-to-dark watercolour method.