A grid of 18 randomly generated smiley faces, each rendered as an SVG with a yellow circular background, two black eyes, and a mouth shaped as a half-circle arc. The faces vary in eye offset, eye radius, and mouth dimensions due to random values passed as props. Built with React and D3 v5, the Mouth component uses `d3.arc()` to generate the path, while `FaceContainer` translates each face into its own SVG element. The code demonstrates reusable component composition for generative, data-driven visuals.