A cartoon face built with D3.js v5 animates its eyebrows in a looping motion. The SVG face includes a circle head, two grey eyes, and a mouth drawn using the `arc` path generator. Eyebrows are rectangles that shift vertically through chained `transition().duration(2000)` calls. The code selects the SVG, centers a group with a transform, and uses React-style imports for `select` and `arc`.