A curved line is a continuous line that bends without sharp angles. Unlike straight lines, which connect two points directly, curved lines can change direction gradually. They are often found in nature, such as in the shape of a circle or the arc of a rainbow. Curved lines are essential in various fields, including art, mathematics, and design. In geometry, they can represent shapes like ellipses and parabolas. In art, artists use curved lines to create movement and flow in their compositions, enhancing the visual appeal of their work.