What is the main feature of a curved line?

Its direction changes gradually, creating a bend or curve

A curved line is identified by a gradual or continuous change in direction. Instead of moving along one fixed straight path, it bends and may form an arc, wave, spiral, or rounded outline. The change can be gentle or strong, but the essential quality is the absence of a single unchanging direction. Curved lines often help an artwork suggest movement, softness, flow, or natural forms.

Option A states this defining feature accurately. Option B describes a straight line because it keeps one direction without bending. Option C describes angular or zigzag construction, where direction changes occur through sharp corners rather than a smooth curve. Option D refers to separate points, not a continuous line. Therefore, the main feature of a curved line is the gradual change of direction, as given in A.

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