This example renders a yellow smiley face with black outlines and a mouth using React and D3. It builds the face inside an SVG element, positioning a background circle, two eyes, and a mouth path around a central group. The code uses React components to define the SVG structure and the `arc()` function from D3 to generate the mouth shape based on specified inner and outer radii and angle ranges. The visual is static, with no interactivity or data binding, and relies on hardcoded dimensions for the face geometry.