Why can very soft curved lines be wrong in a rough rock drawing?

Correct answer: They will weaken the hard texture of the rock

Answer: A. Line quality should agree with the object’s visible character. A rough rock normally has hard edges, uneven planes, and irregular surface changes. Very soft curved lines suggest gentleness, smoothness, or flowing movement, so they can hide or contradict the rock’s coarse and solid texture. A is correct because the lines would weaken the intended textural message. B is wrong because no line type always increases depth; depth depends on form, overlap, size, value, perspective, and other clues. C is wrong because realism comes from matching several observed qualities, not automatically from using soft curves. D is wrong because soft curves usually do not communicate the sharp tension or ruggedness of a rock. Angular, broken, or varied lines may be more suitable, although the exact choice depends on the rock’s form. Memory cue: draw the quality you see—soft marks for softness, irregular marks for roughness.