A D3.js example demonstrates fundamental DOM manipulation by constructing a yellow smiley face with animated eyebrows from SVG shapes. The code appends circles, rectangles, and an arc path to an SVG group, using D3’s selection API and the `arc` generator for the mouth. The right eyebrow transitions downward over two seconds via `transition().duration(2000)`, while all elements are positioned with static attributes. The example showcases basic data-driven document manipulation with D3 v5, using inline SVG rendering and no external data source.