A cartoon face composed of SVG shapes sits at the center of a yellow canvas, built with React components for the background circle, eyes, and mouth. The mouth uses D3's `arc()` generator to create a crescent path from specified radii and angles, while the face is assembled from modular components (`FaceContainer`, `BackgroundCircle`, `Eyes`, `Mouth`) and positioned via SVG transforms. The example demonstrates how React and D3 v7 can be combined, with all rendering handled through declarative SVG elements.