This interactive map displays the world's countries, rendered as SVG paths filled with a green color and outlined in black. The visualization uses D3.js version 5 and the TopoJSON library with the `geoEquirectangular` projection and `geoPath` to draw the map, pulling country boundaries from the world-atlas dataset (countries-110m.json). Upon hovering over a country, its fill color changes from green to blue, providing a simple interactive feedback mechanism.