A yellow circle forms a face with two black eyes, eyebrows, and an arc-shaped mouth. The eyebrows animate upward and then back down repeatedly using chained `transition` calls on a `<g>` element. Built with D3 v5, the example selects the SVG, centers a group, and constructs shapes with `circle`, `rect`, and `path` elements. The mouth uses the `arc` generator with specified inner and outer radii and angles, all rendered as static SVG with JavaScript-driven animation.