This example shows a world map rendered with SVG paths from TopoJSON data, where hovering over a country highlights it in red and a built-in zoom interaction transforms the entire map group. The visualization loads country boundaries from the world-atlas package, joins them with names from a TSV file, and uses d3.geoMercator with d3.geoPath for projection and rendering. It implements zoom via d3.zoom, applies tooltips through SVG title elements, and uses CSS :hover rules to change fill colors on mouseover.