This example visualizes a classic smiley face, constructed from a yellow circle with black stroke as the head, two small circles as eyes, and an arc-based path for the mouth. Using React and D3 v5, the code imports the `arc` function from D3 to define the mouth’s geometry with specific inner and outer radii and angular spans. The SVG rendering is managed through ReactDOM, with coordinate constants and transform attributes positioning elements relative to a central point. The visualization is generated entirely from static values, with no external data source or interactive behavior.