This bar chart displays the population of the top 20 countries in 2020, with countries listed on the vertical axis and population values on the horizontal axis. The visualization uses React components to render SVG elements, with D3’s `scaleBand` and `scaleLinear` mapping data to positions. Each bar’s width reflects the population value, and hovering reveals a tooltip via the SVG `<title>` element. Data is loaded asynchronously from a GitHub-hosted CSV using D3’s `csv` function, formatted with `format('.2s')` to abbreviate large numbers. The chart includes custom axis components for bottom and left ticks.