A stylized horizontal bar chart displays the populations of the top 10 countries from the 2019 UN population dataset. Rendered with SVG, the chart uses React components for the axes and marks, with D3's `scaleBand` and `scaleLinear` for positioning. The bars are colored teal, with gray axis lines and labels, and include hover tooltips via SVG `<title>` elements. The x-axis labels are formatted with D3's `format(".2s")` to convert values from gigabytes to billions.