This example displays a cartoon face built from modular React components, including separate face, eye, and mouth elements. The face and eyes use SVG circles, while the mouth is generated with the `d3.arc` API to create a curved path. Eye colors and facial dimensions are passed as props, allowing the appearance to be tweaked. The entire composition is rendered as an SVG within a React application using D3 v6, with the head centered via SVG transforms.