This bar chart displays the top 10 most populous countries in 2020, using data from the United Nations World Population Prospects 2019. The visualization uses React with D3 v5 scales (`scaleBand` and `scaleLinear`) to map country names to the y-axis and population values to the x-axis. Each bar is rendered as an SVG rectangle, with axes and tick labels drawn from the `AxisBottom` and `AxisLeft` components. The chart's styling is defined in a separate CSS file, and data is loaded asynchronously via D3's `csv` function.