This example renders a smiley face as an SVG graphic using React and D3. It shows a yellow circle with black stroke, two eyes, and a mouth formed by an arc. The code uses React components to structure the SVG elements, and D3’s `arc()` function to define the mouth path based on inner/outer radii and start/end angles. Positions and sizes are computed from constant offsets, with the face centered at 480,250 in a 960×500 viewport.