A yellow SVG face with pink cheeks, eyes, a nose, eyebrows, and a toothy smile is built through fundamental DOM manipulation in D3.js. The eyebrows animate up and down using chained `transition().duration()` calls on a group element. The face is composed of SVG primitives like `circle`, `rect`, and `path`, with the mouth and nose generated using the `d3.arc()` shape generator. The page loads D3 v5 from a CDN and renders entirely with SVG and animation.