This example displays a horizontal bar chart of the top 10 most populous countries using React and D3 v5. The bars are rendered as SVG rectangles, with the x-axis showing population values and the y-axis listing country names. Data comes from the United Nations World Population Prospects 2019 CSV, loaded via d3.csv. The chart uses d3.scaleBand for the categorical y-axis and d3.scaleLinear for the quantitative x-axis, with custom React components for the axes and marks.