A simple face is drawn as yellow SVG circles, with black-stroked outer head, two eyes, and an arc-shaped mouth. The example uses React 18’s `createRoot` to render a static `App` component, while D3 v7’s `arc()` generator computes the mouth path from an inner and outer radius and fixed start and end angles. All shapes are positioned via SVG transform coordinates, and the code demonstrates basic integration of React JSX with D3’s geometry helpers for declarative visualization without interactivity.