This example creates a smiling face using React and SVG, with a yellow circle for the head, two eyes, and a mouth shaped as an arc. The face is assembled from modular components—`BackgroundCircle`, `Eyes`, `Mouth`, and `FaceContainer`—each defined as separate React components. It uses D3’s `arc` generator to construct the mouth path and demonstrates SVG rendering within a React framework. The composition is centered and scaled via transform attributes, with D3 version 7 and React 16.9 as the underlying libraries.