Nine cartoon faces render in a three-by-three grid, each drawn as a yellow SVG circle with black stroke, two eyes, and an arc-based mouth. The React components compose the faces from separate `BackgroundCircle`, `Eye`, and `Mouth` elements, while `d3.arc` generates the mouth path. Random values from `utils.js` determine stroke width, eye offset, eye radius, and mouth dimensions, giving each face slightly different proportions. The `FaceContainer` translates the SVG group to center each face within a 300 by 300 viewport.