This chart displays the ten most populous countries as horizontal bars. The population values are formatted in billions, while country names appear on the left for reference. The visualization is built using React and D3.js, with SVG shapes for the bars and axes. The data comes from the United Nations World Population Prospects 2019, processed with D3's `csv` loader. Axes are constructed using D3's `scaleBand` and `scaleLinear` methods, with interactivity provided through native SVG `<title>` tooltips.