This example shows a horizontal bar chart of the top 10 countries by 2020 population, with axes drawn entirely through React components and D3 scales. The code uses `scaleBand` and `scaleLinear` to map country names and population values to pixel coordinates, while manually rendering tick marks and labels for both axes as SVG elements. Data is loaded from a CSV file using `d3.csv`, and the chart updates reactively through React’s `useState` and `useEffect` hooks.