This example shows a simple yellow face built from SVG shapes, rendered in a browser using React and D3. The face consists of a large yellow circle with a black stroke, two smaller circles for eyes, and a D3 arc path for a mouth. The code constructs the mouth arc using the `arc()` API from D3, specifying inner and outer radii and start and end angles. The entire composition is centered via an SVG `<g>` transform, and the drawing uses React’s declarative syntax to output SVG elements.