This example demonstrates a smiling face drawn with D3.js v5, using SVG shapes and a continuous animation to move its eyebrows. The code constructs the face from basic SVG primitives, including circles for the eyes and a path generated by the `d3.arc` API for the mouth. Eyebrow movement is achieved by chaining `transition().duration(2000)` calls, which animate the `transform` attribute of a group element back and forth. The visualization runs on an 960x500 canvas, centering the facial features with hardcoded offsets and using D3's DOM selection and manipulation functions.