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This example renders a simple, stylized face in SVG using React components. The face consists of a yellow background circle, two black eyes, and a mouth drawn as an arc path. The layout is generated by passing explicit numeric props for center coordinates, eye placement, and mouth dimensions into the React component tree, while the mouth shape is computed with the `d3.arc()` API. All elements are positioned relative to a central translation group created via a `FaceContainer` component.