This example renders a cartoon face built from layered SVG shapes, composed of a yellow background circle, two eyes, and an arched mouth. It uses React components for each facial feature, with a `FaceContainer` providing the SVG canvas and centering transform. The mouth path is generated using d3’s `arc` generator to create an annular sector. All geometry—eye offset, radii, and stroke widths—is passed as props, making the face easily customizable.