This example shows an interactive world map with selectable countries, where hovering over a country reveals its name as a tooltip and highlights it in red. The map uses a natural Earth projection rendered as SVG paths, with a blue sphere background. It loads geographic data from the World Atlas TopoJSON and TSV files, joining country names by ID. The implementation relies on D3 v5 APIs including d3.geoPath, d3.geoNaturalEarth1, d3.zoom, and d3.json, along with a zoom transform applied to the map group for panning and scaling.