A yellow smiley face drawn with SVG demonstrates fundamental D3.js DOM manipulation and transitions. The code selects the SVG element, appends groups, and builds the face from circles, rectangles, and an arc-generated mouth using `d3.arc`. Two eyebrow rectangles animate upward and back via chained `transition().duration(2000)` calls, shifting their parent group's transform attribute. The example uses D3 v5 and relies on `select` and `arc` from the d3 module.