A world map rendered with D3 shows countries in light green on a light blue sphere, with black borders highlighting national boundaries. The visualization uses the Natural Earth projection via `geoNaturalEarth1` and draws the sphere and country paths with `geoPath`. Country data comes from the World Atlas TopoJSON dataset, loaded through `json` and converted with `feature`. Users can pan and zoom the map using D3’s `zoom` behavior, while hovering over a country turns it darker green, revealing its name in a tooltip.