A yellow circle with black eyes, animated eyebrows, and an arc-based smile forms a face in SVG. D3.js v6 uses `select`, `arc`, and method chaining to build the shape, while `transition` animates the brow group up and down. Static elements like circles and rects are grouped with `g` and positioned via `translate`. The code draws entirely from D3 primitives, with no external data, and runs in an 960×500 viewport.