A grid of eighteen smiling faces rendered in SVG, each with randomized facial features including eye position, eye radius, mouth width, and stroke thickness on a yellow circular background. Built with React components that compose `<circle>` and `<path>` elements, the visualization uses the D3 `arc` API to generate each mouth's half-circle path. The layout comes from `d3.range`, and all geometry is computed from constants passed as props to the `Face` component, demonstrating a modular, data-driven approach to generating visual elements.