This example displays the top 10 most populous countries as a horizontal bar chart, using React to render SVG elements and D3 (v5) for scales and data loading. The `xScale` and `yScale` are created with `scaleLinear` and `scaleBand`, while custom `AxisBottom` and `AxisLeft` components generate tick marks and labels. Data comes from the United Nations World Population Prospects 2019 CSV, loaded via D3’s `csv` function, and is sliced to the first ten rows for display.