This example renders a yellow smiley face as an SVG using React components and D3’s arc generator. The face consists of two eye circles and a mouth path defined by `d3.arc()`, all positioned inside a translated group. Hardcoded dimensions set the face radius, eye offsets, and mouth arc parameters, while ReactDOM renders the final SVG into the page. D3 v7 and React 18 are loaded via CDN, with styling applied through a minimal external stylesheet.