This example renders a yellow smiley face that fills the browser window, using React components to structure the SVG elements and D3’s `arc` generator to create the mouth shape. The face is centered via a D3 `arc` path with specified inner and outer radii and angles, while the eyes and head are plain `<circle>` elements. The code imports `arc` from `d3` and uses `ReactDOM.render` with SVG attributes like `stroke-width` and `transform` applied declaratively. The visualization is responsive, with dimensions based on `window.innerWidth` and `window.innerHeight`.