This bar chart displays the top 10 most populous countries using 2019 United Nations population data, with a horizontal layout and stylized teal bars on a Poppins-font interface. Built with React and D3 v5, it uses `scaleBand` for the country axis, `scaleLinear` for population, and SVG `rect` elements for marks. The axes are rendered through custom `AxisBottom` and `AxisLeft` components with D3’s tick formatting, converting billions to abbreviated labels. Hovering reveals exact population values via native SVG `title` tooltips.