Why are curved lines helpful in showing a soft object?

They give a sense of soft bend and flow

A curved line changes direction gradually and does not usually create a sudden, sharp corner. This smooth movement can suggest softness, roundness, flexibility, gentleness, and flowing motion. Artists therefore use curved lines when they want an object or surface to appear soft or naturally shaped. The outline of a cushion, a cloud, a petal, a rounded fruit, or loose cloth can often be shown more effectively with curves than with rigid straight angles.

Option A is correct because the gentle bends of curved lines give the viewer a sense of soft form and continuous flow. Straight or sharply angled lines are more likely to suggest stiffness, hardness, or a constructed structure, although their meaning can change with context. Curved lines do not make a picture formless, and they are not used only for calculation. Their controlled direction helps an artist show volume, movement, and texture, so they are especially useful for representing soft objects.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Line.