This bar chart displays the top 10 countries by 2020 population from a CSV file loaded with d3.csv. Horizontal bars are positioned using d3.scaleBand for the y-axis and scaled with d3.scaleLinear for the x-axis. Rendered as SVG rectangles within a React component, the chart initializes with a “Loading…” message until the asynchronous data arrives. The example demonstrates combining React state management via useEffect and useState with D3’s data-loading and scaling utilities.