A grid of 18 smiling faces, each rendered as a yellow circle with black outline, two eyes, and an arc-shaped mouth, demonstrates randomized facial feature variation. Built with React components and D3’s `arc()` generator for the mouth path, each face uses `Math.random()` to assign unique eye and mouth radii. The SVG is constructed via `FaceContainer`, which translates a centered group, while `BackgroundCircle` and `Eyes` define the base shapes. The faces repeat without spacing, creating a tiled pattern.