A fork of Smiley Face Part II renders a full-screen yellow smiley face using React and D3 v7, with SVG circles for the head, eyes, and mouth. The face is centered dynamically based on window dimensions, and the head radius is calculated from the viewport height minus half the stroke width. The code uses ReactDOM to mount the component and relies on D3 only for its version-loaded library, while the drawing itself is pure SVG primitives within a transformed group.