This example demonstrates a natural Earth projection map of world countries, highlighting basic interaction techniques for geographic visualizations. The map renders countries as SVG paths using `d3.geoPath` with a `geoNaturalEarth1` projection, with data from the World Atlas TopoJSON and TSV files. Users can pan and zoom the map through D3’s `zoom` behavior, which applies a transform to the map group. Hovering over any country turns it red, and a tooltip showing the country name appears via appended SVG `title` elements.