This example renders a classic smiley face as a static SVG graphic using React. The visualization draws a yellow circle with a black outline for the head, along with two small circles for eyes and a half-annulus for the mouth. The code uses React and ReactDOM to create the SVG elements, and it leverages the `d3.arc()` API from D3 to generate the mouth’s path with specified inner and outer radii and angular range. The composition is centered on a 960×500 canvas.