A choropleth map shows the primary balance of countries, colored on a Yellow-Orange-Red ordinal scale, with a clickable legend to filter and highlight selected economic categories. Built with D3 v5, it uses `d3.geoEquirectangular` and `d3.geoPath` to render SVG country paths from TopoJSON (world-atlas 50m), joined with CSV data. The map supports zooming via `d3.zoom`, and legend interactions trigger re-renders that adjust country opacity and highlight states.