This example uses D3.js v5 to build a cartoon face from SVG primitives. A large yellow circle forms the head, with two black circles for eyes placed at fixed offsets and a yellow arc path generated via the `arc()` function for the mouth. Rectangular eyebrows are animated with chained `.transition()` calls, moving downward and back over two seconds each. The SVG canvas is set to 960 by 500 pixels with a red background, and all shapes are positioned relative to the center using D3's selection and attribute methods.