This example demonstrates how to integrate D3 and React to render a smiley face as a scalable SVG graphic. The visualization uses React components to define the SVG structure, while the D3 `arc` API generates the mouth path. The face consists of a yellow circle with a black stroke, two eye circles, and a curved mouth, all positioned using computed coordinates and transformations. The code imports `arc` from D3 v5 and uses React’s `ReactDOM.render` to mount the component, showing a declarative approach to combining these libraries.