This example shows a simple, animated face built with SVG shapes in React. The code uses D3 v5 selection methods to create a yellow circle for the head, two circles for eyes, and a path for a mouth generated with the `d3.arc` API. A rectangular eyebrow is animated using chained `transition().duration(2000)` calls, moving it vertically and back. Rendering is done entirely through SVG elements, with static positions defined in `index.js` and loaded via `bundle.js`.