This example renders a stylized smiley face using React and D3.js, drawing SVG shapes such as circles, paths, ellipses, and lines. It uses the `d3.arc` API to construct the mouth and eye arcs, with predefined inner and outer radii and angles. The face is centered within a 960×500 viewport, featuring yellow circular head, black outlined eyes with white highlights, a red tongue, and additional line-based hair or accessory details, all composed programmatically.