This example demonstrates fundamental DOM manipulation by creating a smiley face whose eyebrows animate. Built with D3.js v5, the SVG face is constructed through methods like `d3.select`, `d3.attr`, and `d3.append` to draw circles, paths, and lines. The animation of the eyebrows relies on timed updates to their `y` attributes, showcasing how D3 binds data to visual properties. The code includes a linked tutorial video and renders entirely in an SVG canvas.