This example renders a world map using D3’s `geoNaturalEarth1` projection and `geoPath` to draw SVG paths for landmasses, country borders, and the sphere outline. Data comes from the World Atlas TopoJSON file via `topojson.feature` and `topojson.mesh`, loaded asynchronously with `json()` into React state. The map fills land in teal, strokes interior borders in a lighter shade, and uses a light gray background for the ocean.