A yellow SVG face renders in a React component, featuring a circular background, two eyes, and a mouth drawn with the d3.arc path generator from d3. The face is centered in a 960x500 viewport, with all geometry specified via constants for offsets, radii, and stroke widths. React 18 and ReactDOM manage the SVG output, while CSS styles a separate "Hello HTML!" message behind it. The example combines React's declarative component structure with D3's arc API for precise shape construction, demonstrating a minimal hybrid approach.