This example renders a smiley face as an SVG graphic using React components and D3’s arc generator. It shows a yellow circle with black stroke, two static eye circles, and a mouth arc drawn with `d3.arc()`, all centered via a translation transform. The code uses React 17 and D3 v6 to construct the shape, with hardcoded dimensions for the face, eyes, and mouth, and applies the arc’s inner and outer radii and angle range to define the smile.