A yellow smiley face with animated eyebrows demonstrates basic D3.js DOM manipulation. The SVG elements—circles for the eyes, rectangles for the eyebrows, and an arc-generated mouth—are positioned using translation transforms. The code imports `select` and `arc` from D3 v5 and uses chained `transition().duration()` calls to move the eyebrow group upward and back, creating a repeating eyebrow-lift animation. The face is centered within a 960×500 SVG viewport.