A horizontal bar chart displays the ten most populous countries in 2020, with population values encoded as bar lengths. The visualization uses React and D3 v5, employing `scaleBand` for the categorical y-axis and `scaleLinear` for the quantitative x-axis. The `AxisBottom` and `AxisLeft` components render tick marks and labels, while `Marks` creates the rectangular bars. Population data comes from the United Nations World Population Prospects 2019, loaded via D3's `csv` function and formatted with `format`.