Let's make a face with D3.js!
A yellow smiley face is drawn using SVG circles and a path, with D3's `arc` generator creating the mouth. The face's eyebrows, rectangular SVG elements, animate upward and back down over two seconds using chained `transition` calls with `attr` updates. The example demonstrates fundamental D3.js v5 DOM manipulation, including `select`, `append`, and `attr`, to build and transform SVG elements within a fixed 960×500 viewport.