This example shows the top 10 most populous countries as a horizontal bar chart, based on United Nations World Population Prospects 2019 data. React components render SVG axes and marks using d3.scaleBand and d3.scaleLinear, with d3.format for tick labels converting billions to “B” notation. The chart uses CSV data loaded via d3.csv, styled with a Poppins font and teal bars, and includes a tooltip via SVG `<title>` elements.