An interactive world map rendered as an SVG using D3.js, with pan and zoom controls. The map displays countries as gray polygons with dark borders, and allows users to click on a country to highlight it and display its label. It uses d3.geoEquirectangular for projection, d3.geoPath for rendering, and the d3.zoom behavior for interactive navigation. The map data comes from a TopoJSON file, and the visualization also responds to window resizing by recalculating zoom limits and centering the view.