This example shows a horizontal bar chart of the ten most populous countries for 2020, using population data loaded from a CSV file. The chart is rendered as SVG within a React application, with each bar’s length proportional to the country’s population. The code uses React’s `useState` and `useEffect` hooks to fetch and parse the data with `d3.csv`, then employs `d3.scaleBand` and `d3.scaleLinear` to map countries and population values to the chart’s dimensions.