A grid of eighteen smiley faces renders in React, each with randomized eye positions, eye radii, mouth widths, and stroke thicknesses. The faces are generated using D3 v7’s `arc()` generator for the mouth and SVG circles for the eyes and background. All components are React function components, with the overall layout using D3’s `range()` to create the array of faces. The SVG output is centered via a translation group.