This example shows a yellow smiley face built with React and D3, rendered as SVG on a blank HTML page. It uses D3’s `arc` generator to create the mouth path, while the face, eyes, and outline are simple SVG circles with fixed sizes and positions. The code imports React for component structure and D3 v7 for the arc shape, then mounts the graphic inside a `ReactDOM.render` call. The visualization is purely static, demonstrating a minimal integration of D3 with React’s declarative rendering.