This bar chart displays the populations of the ten most populous countries, using horizontal bars with a stylized, minimalist aesthetic. Built with React and D3 v6, it loads data from a CSV via `d3.csv` and renders SVG elements. The visualization uses `scaleBand` for the categorical y-axis, `scaleLinear` for the numeric x-axis, and a `format` function to abbreviate population values in billions. Hovering over a bar reveals a tooltip with the full population figure.