This example shows an interactive world map built with D3.js v5 and TopoJSON, displaying country boundaries with hover effects that highlight each nation in red. The map uses a natural Earth projection via `d3.geoNaturalEarth1` and renders geographic features as SVG paths with `d3.geoPath`. Pan and zoom interactions are enabled through D3’s `zoom` behavior, transforming the map group on user input. Country names are loaded from a TSV file and matched to geographic IDs, with tooltips shown via SVG `<title>` elements. The code also leverages `d3-geo-projection` and world-atlas data.