This example renders a partial smiley face using React and D3.js, showing a pink circle with black stroke, two eyes, and a mouth arc drawn with D3’s `arc` generator. The face is centered via SVG grouping and transformations, with the mouth path built from inner and outer radii and angular start/end points. It uses React for component structure and `d3.arc` to compute the mouth’s path data, all rendered as static SVG elements at a fixed 960×500 canvas size.