This horizontal bar chart displays the 2020 populations of the top 30 countries, arranged from largest to smallest. The visualization uses React and D3 v5 to render scalable vector graphics (SVG) directly within a React component. Data is loaded from a CSV file via D3’s `csv` function, with population values parsed and formatted using `d3.format`. Axis components generate SVG line and text elements, while rectangle marks include native SVG tooltips to reveal precise population figures on hover.