This example uses D3.js v5 to draw a smiling face in an SVG, composed of a yellow circle, two eyes, animated eyebrows, and a mouth path. The face is centered in a 960x500 canvas, with the mouth created using the `arc` function to generate a curved path. Eyebrows are rectangles that animate up and down via chained `.transition()` calls, each lasting 2000 milliseconds. The code relies on D3’s selection and shape-generation APIs, with the SVG created in the HTML file and styling handled by an external stylesheet.