A yellow smiley face is drawn in SVG using D3.js, with circular eyes, rectangular eyebrows, and an arc-based mouth. The face demonstrates fundamental DOM manipulation and animation through D3's `select`, `append`, and `transition` methods. The eyebrows move up and down repeatedly via chained `transition().duration(2000)` calls, translating the eyebrow group vertically while the rest of the face remains static. The example uses `d3.arc` to generate the mouth path and positions all elements relative to the SVG's center.