This example renders a yellow smiley face using React and D3’s `arc` generator. The face consists of a large yellow circle with a black stroke, two black eye circles, and a mouth drawn as an arc path via `d3.arc()` with specified inner and outer radii and start/end angles. The SVG output is 960×500 pixels, and all shapes are positioned relative to a centered translation. The code uses React 17, D3 v7, and SVG rendering with hardcoded dimensions.