This example visualizes a smiley face rendered as an SVG using React and D3. The face consists of a yellow circle, two eyes with white highlights, and a mouth drawn as an arc using the `d3.arc()` API. Positioning relies on React’s JSX with SVG elements, while D3 handles the arc path generation. The layout uses fixed coordinates and offsets derived from the viewport dimensions, with static styling applied via SVG attributes. No interactive or data-driven behavior is present.