This interactive choropleth map colors each country by its economy category, using a spectral color scale and click-to-highlight interaction to compare regions. Built with D3 v5, it renders country outlines via `d3.geoPath` with a Natural Earth projection, loads TopoJSON country boundaries from the World Atlas, and joins economic classifications from a TSV file. A zoom behavior enables panning and scaling, while an ordinal color legend supports filtering by clicking a category to fade unmatched countries.