A D3.js v5 example creates a smiley face in an SVG, animating its eyebrows through a sequence of transitions. The face is built with a yellow circle for the head, two circles for eyes, and a crescent-shaped path for a mouth, all grouped and transformed to center on the canvas. Eyebrows, rendered as rectangles, move up and down over two-second durations using the `transition` API, demonstrating fundamental DOM manipulation with `select` and `append` methods.