A cheerful yellow face is drawn with D3.js, featuring circular eyes, rectangular eyebrows, and a curved mouth, all rendered as SVG elements. The eyebrows animate up and down over two seconds using D3 transitions. The code uses `d3.select`, `d3.arc`, and SVG shape methods like `append`, `attr`, and `transition` to build the face within a 960x500 viewport, centering the elements with a group transform.