This example shows an interactive world map with zoom and pan capabilities, where country boundaries are drawn in light green and highlight in red on hover with name tooltips. It uses d3.geoNaturalEarth1 projection, d3.geoPath for rendering, and d3.zoom for the pan/zoom interaction. Country data comes from the world-atlas TopoJSON dataset, paired with TSV names, and the tooltips are implemented with SVG title elements. Styling uses simple CSS for hover effects and sphere coloring.