This example displays UN population data for the top 10 countries in 2020 as horizontal bars rendered in SVG via React. It loads the dataset using `d3.csv`, then uses React’s `useState` and `useEffect` to fetch and store the data. D3’s `scaleBand` and `scaleLinear` map country names and population values to pixel positions and widths, while React maps the data array to `<rect>` elements. The visualization demonstrates a hybrid approach where D3 handles data loading and scaling, and React manages the DOM rendering.