This choropleth map displays approximate population data for select countries, with values in millions encoded through a sequential blue color scale. Countries without data appear in gray. The visualization uses d3.geoNaturalEarth1 for projection, d3.geoPath for rendering geographic features from TopoJSON data, and d3.scaleSequential with d3.interpolateBlues for color mapping. Interactive tooltips appear on mouse movement, showing each country’s name and population value. A simple legend accompanies the SVG rendering.