This stylized bar chart displays the top ten countries by population for 2020, using horizontal bars drawn as SVG rectangles whose widths encode the population values. The chart is built with React and D3 (v6), using D3 scale functions to map data to coordinates and custom `AxisBottom` and `AxisLeft` components to render ticks. Data is loaded via D3’s `csv` and formatted with `format(".2s")` to show values in billions. Hovering over a bar reveals a tooltip with the exact population.