This example displays the top 10 most populous countries as horizontal bars, with population values formatted in billions. The chart uses React components to render SVG elements, with D3’s `scaleBand` and `scaleLinear` mapping country names and population counts to screen coordinates. Axes and marks are generated through custom React components, and the data comes from the United Nations World Population Prospects 2019, loaded via D3’s `csv` function. Styling applies the Poppins font with teal bars and gray tick lines.