A horizontal bar chart displays the populations of twenty countries in 2020, using D3.js scaleBand and scaleLinear to map country names and population values to SVG rectangles. The React-based visualization reads CSV data from a GitHub repository, formats axis tick labels using D3's format function to abbreviate large numbers, and includes interactive tooltips via SVG `<title>` elements. Axes are rendered with custom React components, with blue tick lines and green bars styled through CSS.