A bar chart displays the population of 20 countries in 2010, ranked along a vertical band scale. The React application loads CSV data from a GitHub URL via D3’s `csv` and uses `scaleBand` and `scaleLinear` to position bars, with axes rendered as SVG elements from custom `AxisBottom` and `AxisLeft` components. Native SVG `<title>` elements provide tooltips on hover, and ticks are formatted using `format('.2s')` to abbreviate large numbers.