A yellow smiley face with animated eyebrows demonstrates basic DOM manipulation with D3.js v5. The code uses `d3.select`, `d3.append`, and `d3.arc` to build SVG elements, while chained `transition().duration(2000)` calls move the eyebrow group up and down. The mouth is drawn as an arc path, and circles and rectangles form the eyes and brows. Static SVG attributes define the geometry, with the entire face centered via a translated group.