This visualization displays the top 10 most populous countries in 2020 as a horizontal bar chart, using React to render SVG rectangles that scale with each country’s population. It loads CSV data via `d3.csv` and transforms the population column to numeric values with a custom row function. The chart employs `d3.scaleBand` for the country categories and `d3.scaleLinear` for the population values, while React’s `useState` and `useEffect` manage the asynchronous data fetching and rendering state.