A grid of eighteen smiley faces, each rendered as a yellow SVG circle with black outline, eyes, a mouth, and a nose, demonstrates a reusable React component pattern. The faces vary slightly due to randomized eye offsets and radii applied per instance. Built with React and D3 v7, the visualization composes modular components like `BackgroundCircle`, `Eyes`, and `Mouth`, where the mouth uses d3’s `arc` generator and the nose is drawn with `d3.line`.