A map of world countries renders as SVG paths, with each country colored white and outlined in dark grey, while oceans appear light blue. Hovering a country turns it light blue. The visualization uses D3 v5’s `geoNaturalEarth1` projection and `geoPath` to draw the sphere and country boundaries from the world-atlas TopoJSON dataset, with `topojson.feature` converting the raw data into features. Zooming is enabled via D3’s `zoom` behavior, which applies transforms to the map group.