This example shows a simple cartoon face built with D3.js v5 and React, rendered as SVG with animated eyebrows. It uses `d3.select` and `d3.arc` to create the face shape, eyes, and mouth, while `transition().duration()` animates the eyebrows up and down repeatedly. The face is centered using SVG group transforms, with fixed pixel offsets for eye spacing and brow placement. No external data is used; all geometry is defined directly in code.