This bar chart displays the top 10 most populous countries for 2020, based on United Nations World Population Prospects 2019 data. The visualization uses D3.js v5 within a React framework, rendering bars as SVG rectangles. It includes animated interactions where hovering over a bar highlights it, displays its value, and shows the percentage difference compared to other countries. The chart features labeled axes for population and country names, with tooltips providing exact population figures via SVG `<title>` elements.