This bar chart displays the populations of 30 countries for the year 2020, sorted along a vertical band scale with proportional horizontal bars. The visualization uses D3 v5 scaleBand and scaleLinear to map data loaded from an external CSV via d3.csv, while React components handle axis rendering and marks. SVG rectangles represent each country, with a native title element providing tooltips, and axes are formatted using D3’s si-format to abbreviate large numbers.