What effect may be created by adding salt to a wet watercolour surface?

Correct answer: Granular texture

The governing concept is experimental watercolour texture. When salt is sprinkled onto a still-wet wash, it can draw moisture and pigment toward the crystals, leaving lighter, grainy or star-like marks as the area dries. Thus option C, granular texture, is correct. Salt cannot create a flat black layer or straight lines, and it does not cut the paper. The salt should be brushed away only after the paint has dried sufficiently.