This example displays a map of U.S. states, rendered as outlined polygons using React and SVG. The map uses the `geoAlbersUsa` projection from D3 v5 and draws state boundaries with `d3.geoPath`. Geographic data is loaded from the U.S. Atlas TopoJSON, converted via the `topojson.feature` API, and styled with a teal fill on a light gray background. Although the README mentions world country boundaries and graticules, the current code focuses solely on U.S. state shapes.