This example uses React and D3 to display a horizontal bar chart of the top 10 countries by 2020 population from a UN dataset loaded via d3.csv. The chart shows each country’s population as a bar, using D3’s scaleBand and scaleLinear to map country names and population values to screen coordinates within an SVG rendered by React. React’s useState and useEffect manage the asynchronous data loading, and the visualization updates once the CSV is fetched and parsed.