This example shows a simple cartoon face composed of a yellow circular background, two eyes, and a mouth, all rendered as SVG elements in a React application. The face is centered on a 960×500 canvas, and each facial feature is built from reusable React components. The mouth is drawn using the `d3.arc()` API with a predefined start and end angle, while the background and eyes are plain SVG circles. The code uses React 16.9 and D3 v7, passing coordinates and radii as props to control the face’s layout.