This example renders a classic smiley face as a static SVG graphic using React and D3 v7. The drawing consists of a yellow circle for the head, two small circles for eyes, and a mouth defined by an arc path created with the `d3.arc` API, positioning all elements via computed coordinates and transform translations. The code demonstrates manual SVG construction within a React component, using the `d3` arc generator to produce the mouth’s path data. The rendering is purely vector-based, with no external data source.