This chart displays the 2020 population estimates for 30 countries as a horizontal bar chart, sorted with the largest populations at the top. Each bar’s length encodes the population value, with a tooltip showing the formatted number on hover. The visualization uses React with D3’s `scaleBand` and `scaleLinear` to map data to SVG rectangles, while `AxisBottom` and `AxisLeft` render axes with custom tick formatting that converts billions and millions into readable labels. Population data is loaded asynchronously via `d3.csv`.