A smiling face composed of layered SVG shapes demonstrates modular React component composition. A yellow circle forms the head with a black stroke, while two black circles serve as eyes positioned symmetrically around the center. The mouth is drawn using D3's arc generator, creating a semi-circular path with configurable radius and thickness. The face is rendered inside an SVG container that centers all elements via a translation transform, with all dimensions and positions passed as props from a single parent component.