This example shows a horizontal bar chart of the top 10 most populous regions and countries for 2020, rendered as SVG elements. The React component uses the `useState` and `useEffect` hooks to load data from a CSV file via D3’s `csv` utility, then maps that data to `<rect>` elements. D3’s `scaleBand` and `scaleLinear` position the bars vertically and size their widths, while `max` determines the domain for the linear scale.