This choropleth map visualizes world countries using a natural Earth projection, with each country filled in light green and outlined in black. The visualization loads geographic data from the World Atlas TopoJSON and TSV files, using `d3.geoPath` and `geoNaturalEarth1` to project and render country boundaries. Countries are colored by their assigned fill, and hovering over a country turns it red, while a tooltip displays the country name. The map includes a blue sphere background and supports zoom interactions through D3’s zoom behavior.