A classic yellow smiley face rendered as an SVG with React and D3 v7. The face consists of a yellow circle with a black stroke, two black eyes positioned symmetrically, and a mouth drawn using the D3 `arc` generator with a fixed inner and outer radius. The React component computes all geometry from constants for the center, eye offsets, and dimensions, then renders the shapes via JSX inside a single `<g>` group. The diagram uses static, hard-coded values rather than external data.