A stylized bar chart displays the top 10 most populous countries for 2020, using horizontal bars ordered by population. The visualization is built with React and rendered as an SVG, leveraging D3 v5’s `scaleBand` and `scaleLinear` for axis scaling and `format` for tick labels. Data comes from the United Nations World Population Prospects 2019, loaded via `d3.csv`. Custom components (`AxisBottom`, `AxisLeft`, `Marks`) structure the chart, with tooltips showing formatted population values on hover.