Smiley Face Part Six
A grid of identical yellow smiley faces renders in a React application, each face composed of SVG circles and a path arc. The faces are generated using `ReactDOM.render` and a `range` from d3.v7, which maps 18 iterations to create multiple copies. Facial features are modular React components: `BackgroundCircle` sets the yellow face with a black stroke, `Eyes` positions two circles, and `Mouth` uses `arc` from d3 to draw a smile. Each face receives randomized eye radius values, producing subtle variation across the grid.