This example renders a yellow smiley face using React and D3 v5, with SVG elements for the face, eyes, and mouth. The code defines circles for the head and eyes, while a D3 arc generator (`arc()`) creates the mouth path with specified inner and outer radii and angular extents. All shapes are positioned relative to a center point using SVG group transforms, and the styling includes a yellow fill with a black stroke. The implementation uses React’s `ReactDOM.render` to mount the SVG into the DOM, with static geometry values for offsets and radii.