This example shows a horizontal bar chart displaying the top 10 countries by population for 2020, with each bar’s length proportional to population values. The chart loads CSV data from a GitHub gist using D3’s `csv` method within a custom `useData` React hook, which manages the asynchronous data fetching via `useState` and `useEffect`. The visualization then maps the data using D3’s `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis, rendering the bars as SVG `<rect>` elements within a React component.