A yellow smiley face with animated eyebrows and a shifting mouth is drawn as SVG elements using D3.js v5. The code builds the face by appending circles, rectangles, and an arc path to a group, then applies chained `transition` calls with a 2000-millisecond duration to move the eyebrows upward and alter the mouth’s end angle. It uses D3’s `select`, `arc`, and attribute manipulation to demonstrate fundamental DOM updates and transitions without any data source.