A React-rendered SVG smiley face fills the browser window, with a yellow circle, concentric-ringed eyes, a red arc mouth, and angled eyebrow lines. The code uses React 16.9 and D3 v6’s `arc()` generator to construct the mouth path, while all other shapes are plain SVG elements. Position and size values are derived from `window.innerWidth` and `innerHeight`, and the face is centered via a group translation. The example demonstrates combining React’s declarative component structure with D3’s geometric utilities for static SVG visualization.