This bar chart displays population estimates for the top ten countries in 2020, sourced from UN population data. The visualization uses a horizontal layout with a linear x-scale and a band y-scale, styled with teal bars and formatted tick labels that convert billions to "B" notation. Built with D3.js (v6) and React, the chart renders as SVG, with reusable components for axes and marks that include native tooltips via the `<title>` element. A Poppins font and minimal styling create a clean, modern appearance.