A yellow smiley face rendered in SVG uses D3.js v5 to demonstrate fundamental DOM manipulation. The face consists of a large yellow circle for the head and two smaller black circles for eyes, all positioned using D3’s `select` and `append` methods with explicit `attr` calls for coordinates and styling. The code imports only `select` from D3’s module API, computes dimensions from the SVG element, and hardcodes eye spacing and offsets. No interactive or animated behavior is present, focusing purely on static shape construction.