A grid of eighteen identical smiling faces, each rendered as a yellow circle with black stroke, two eyes, and a mouth, demonstrates a modular React component approach to SVG visualization. The `Face` component composes `BackgroundCircle`, `Eyes`, and `Mouth` elements within a shared `FaceContainer`. Eye and mouth radii vary randomly per face, while the mouth uses the `d3.arc()` API to generate a path. The example uses React 17, D3 v7, and a ReactDOM render into an HTML `div`.