This example shows a smiley face rendered as an SVG graphic using React and D3. The face consists of a skyblue circle for the head, two smaller circles for eyes, and a mouth created with D3’s `arc` generator. The code defines constants for dimensions, positions, and radii, then uses a React component to output SVG elements. The `mouthArc` uses `d3.arc` with specified inner and outer radii and start/end angles to form the smile. The rendering approach combines React’s declarative UI structure with D3’s shape-generation API.