A yellow circle with a black outline forms a face, featuring two eyes and a mouth, while the eyebrows animate by shifting downward and then returning upward over four seconds. The example builds an SVG scene using d3.select and d3.append to structure the face from primitive shapes, including d3.arc for the mouth's curved path. The animation relies on chained d3.transition calls with a two-second duration, altering the eyebrow group's transform attribute to create the repeated motion.