This bar chart displays the populations of ten countries in the year 2000, ranked vertically with horizontal bars. The visualization uses React and D3 v5, with `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis. Data is loaded via `d3.csv` from a remote GitHub CSV source, and bars are rendered as SVG rectangles with tooltips formatted using D3’s `format('.2s')` to abbreviate large numbers. The axes are custom React components, and the styling includes green bars and blue tick lines.