A yellow smiling face is drawn entirely with D3.js SVG shapes, including a circular head, two eyes, animated eyebrows, and an arc-based mouth. The eyebrows and left eyebrow rectangles move up and sideways in a looping 2000-millisecond transition, while the mouth uses the d3.arc generator with specified inner and outer radii and angles. The code selects the SVG element, centers a group via translation, and applies chained transitions to animate the facial features.