A horizontal bar chart ranks the 20 most populous countries by their 2010 population figures. The visualization uses React components to render SVG rectangles, with D3’s `scaleBand` and `scaleLinear` mapping country names and population values to screen coordinates. Data is loaded asynchronously via `d3.csv` from a GitHub-hosted CSV file, with axis tick labels formatted using D3’s `format` helper. Each bar includes a `<title>` element for native tooltip display, and the chart is styled with green marks and blue axis lines.