A yellow smiley face is drawn with SVG shapes created using D3.js, featuring a circular head, two eyes, rectangular eyebrows, and an arc-based mouth. The code demonstrates fundamental DOM manipulation and animation through chained `transition().duration()` calls that move the eyebrows up and down in a repeating loop. Built with D3 v5, the example imports `select` and `arc` from the D3 module, positions elements using SVG attributes, and runs entirely in the browser with inline JavaScript.