Why does making stone texture equally dense everywhere weaken volume?

Correct answer: Texture contrast should change according to light and surface turning

The governing concept is the hierarchy between form and texture. Stone marks should follow the surface and vary in contrast: clearer or stronger where light reveals the plane, and quieter where the form turns away or enters shadow. If every mark is equally dense, the texture competes with the broad value pattern and flattens the object. Therefore A is correct; texture is not limited to shadow and uniform detail is not automatically realistic.