This example shows a horizontal bar chart of population data for ten countries in 2020, loaded from a CSV file and rendered as SVG. The visualization uses React to manage state and render components, while D3 v7 handles data loading with `d3.csv`, scales via `scaleBand` and `scaleLinear`, and computes tick values for the x-axis. The chart displays rectangular bars for each country, with axis labels generated using D3’s tick mapping and React’s JSX for markup. The code clearly separates the data-fetching logic into a custom `useData` hook, demonstrating React’s `useState` and `useEffect` for asynchronous data loading.