This example renders a classic smiley face using React components and D3’s `arc` generator to create the mouth path. A yellow circle serves as the face, stroked in red, with two black eyes positioned symmetrically on either side. The D3 arc function defines the mouth’s inner and outer radii and angular range, while React handles the SVG structure with JSX and a reusable `BackgroundCircle` component. The visualization is static, with all geometry computed from fixed constants and drawn entirely through SVG elements.