This example builds a smiley face with SVG shapes using React and D3. The code centers a yellow circle with a black stroke, places two black eyes with offset coordinates, and renders a mouth using D3’s `arc` function to define a path with inner and outer radii. All elements are positioned via a transform on the SVG group, pulling coordinates from D3’s arc API and React components. The visualization relies on D3 v7 and React 17, drawing directly to SVG.