This example renders a smiley face using React and SVG, with a yellow circular background, two eyes, and a mouth drawn as an arc. The visualization uses static, hardcoded dimensions for the face components, including eye offsets, eye radius, and mouth radius, rather than data-driven values. It employs the `arc` function from d3 to generate the mouth path, while React components structure the SVG elements. The `BackgroundCircle` component accepts radius and stroke width props, demonstrating a modular approach to building the graphic within a fixed 960×500 viewport.