This example shows a horizontal bar chart of the top 20 countries by population in 2010, sorted in descending order. The visualization uses React to render SVG elements, with d3.scaleBand and d3.scaleLinear for positioning bars. The code imports d3.csv to load data from a GitHub-hosted CSV file, and d3.format to abbreviate axis tick labels (e.g., “B” for billions). Hovering over a bar reveals a tooltip via the native SVG <title> element, and the chart includes styled axes with blue tick lines and green bars.