This bar chart displays the top 10 countries by estimated 2020 population, with horizontal bars whose lengths correspond to population values. The React component loads data from a CSV file using d3.csv, then scales the bars with d3.scaleBand for the categorical y-axis and d3.scaleLinear for the quantitative x-axis. Each bar is rendered as an SVG rectangle, with width mapped from the population field. The chart includes a loading state while data is fetched asynchronously.