This example displays a world map using natural Earth projection, with countries rendered as filled paths and a stylized sphere outline. It loads GeoJSON country boundaries from the world-atlas TopoJSON dataset via a CDN, then converts the data using the `feature` function from TopoJSON. The visualization is built with React and D3 v5, leveraging `d3.geoNaturalEarth1` for projection and `d3.geoPath` to generate SVG paths. Country fills alternate between teal and red strokes, while the sphere background uses a light cyan fill.