This example uses React and D3 to render a bar chart of the top 10 most populous countries from the United Nations World Population Prospects 2019 dataset. It shows the population values as horizontal bars, with axes drawn manually using D3 scales and SVG elements. The code employs `d3.csv` for data loading, `scaleBand` for the y-axis, `scaleLinear` for the x-axis, and React hooks like `useState` and `useEffect` to manage data fetching. All visuals are rendered as SVG within a React component.