A horizontal bar chart displays the ten most populous countries for 2020, sourced from UN population data. Built with React and D3 v7, the visualization renders as SVG, using `scaleBand` for the categorical y-axis and `scaleLinear` for the numeric x-axis. React's `useEffect` and `useState` manage asynchronous CSV loading, while D3's `csv` fetches the data; axes and bars are constructed from mapped ticks and rect elements.