A yellow smiley face rendered in SVG uses D3.js v5 for fundamental DOM manipulation. Circles form the head and eyes, while an arc path creates the mouth. Two rectangular eyebrows animate independently using `transition().duration(3000)` to shift their vertical position. The code demonstrates chaining `.attr()` methods to set SVG attributes, using the `select` and `arc` APIs from the d3 module, and applies static styling through a linked stylesheet. This example focuses on basic element creation and sequential transitions.