This example renders a classic yellow smiley face as a static SVG composition using React components for the background circle, eyes, and mouth. The mouth is drawn with a d3 arc path using a computed inner and outer radius, while the facial features are positioned relative to a centered group transform. The code defines fixed numeric constants for dimensions, uses React 17 for component structure, and relies on d3.v7 for the arc generator, with SVG elements providing the final visual output.