This example shows a horizontal bar chart of population data for the top 10 countries in 2020, with axes drawn manually using React components. The code loads the UN Population dataset via `d3.csv`, then uses `scaleBand` and `scaleLinear` from D3 to position bars and ticks, while React state and `useEffect` manage data loading. SVG elements like `<rect>` and `<line>` render the bars and axis ticks, with text labels positioned via D3 scales, all inside a React component tree rendered to the DOM.