This example visualizes the population of ten countries in the year 2000, using a horizontal bar chart rendered as SVG within a React application. The chart displays countries on the y-axis and their population values on the x-axis, with a tooltip showing the formatted population value for each bar. The implementation uses D3 v5's `scaleBand` and `scaleLinear` for scaling, along with custom React components for axes and marks, while the data is loaded from a CSV file via `d3.csv`.