This bar chart displays the 2020 population estimates for 30 countries, with country names on the y-axis and population values on the x-axis. The visualization uses React to structure SVG elements, with D3 v5's `scaleBand` and `scaleLinear` for positioning and `format` for tick labels. Data is loaded asynchronously from a CSV file using `d3.csv`. Marks are rendered as SVG rectangles with tooltip titles, while custom axis components generate ticks and labels.