This interactive world map displays country boundaries and allows users to hover over each country to see its ISO numeric ID in a tooltip and click to zoom in on it. The visualization uses D3.js v7 with the `d3.geoNaturalEarth1` projection and `d3.geoPath` to render the map, loading TopoJSON data from the world-atlas CDN and converting it to GeoJSON features with the `topojson-client` library. A graticule grid is overlaid, and animated zoom transitions are handled with the `transition` method. The map supports a reset button to restore the initial zoom level.