A smiling face renders in SVG on a yellow circular background with a black stroke, open black eyes, and an arc-shaped mouth. The example composes three React components: BackgroundCircle, Eyes, and Mouth, with the mouth generated using d3’s `arc` function to create a path from specified inner and outer radii and start/end angles. The visualization is built with React and D3 v6, positioned via SVG transforms in a 960×500 viewport, and demonstrates a modular approach to constructing a simple graphic from reusable parts.