This example renders a cartoon smiley face entirely with SVG shapes, using React to create and update the markup while D3’s `arc` generator defines the mouth’s curved path and the eyebrow segment. Static circles and ellipses position the eyes, pupils, and a red nose, with a yellow face outlined by a thick black stroke. The visualization demonstrates how D3 helper functions can be embedded within a React component’s render output, with all geometry computed from fixed constants rather than a data source.