This example displays a horizontal bar chart of the top ten countries by 2020 population, using SVG rectangles rendered through React. The code loads population data from a CSV file via `d3.csv`, then uses `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis. Each bar’s width is mapped from the population value, with the height determined by the band scale’s bandwidth. The visualization demonstrates a React component that fetches data asynchronously with hooks and renders it using D3’s scaling utilities.