A bar chart displays United Nations population estimates for 2020 across ten countries, using horizontal bars scaled by population size. The visualization loads CSV data via `d3.csv` and manages the asynchronous result with React’s `useState` and `useEffect` hooks. React renders SVG rectangles, while `d3.scaleBand` and `d3.scaleLinear` compute bar positions and widths. The data pipeline converts the population string to a number and filters to the top ten entries before rendering.