This example demonstrates how to construct a smiley face using fundamental D3.js v5 DOM manipulation with SVG elements. The code builds a red circular head with eyes, a nose, ears, eyebrows, a mouth, and teeth through individual shape selections using `d3.select` and SVG attribute chaining. It uses the `d3.arc` generator to create the nose and mouth paths, while static SVG elements like circles and rectangles are positioned manually. The face is centered via a group transform, and the eyebrows are rotated to give the face an expressive, animated look.