This visualization displays the population of the top nine countries in 2020, sorted in descending order using horizontal bars. Built with React and D3 v7, it uses `scaleBand` for the y-axis country categories and `scaleLinear` for the x-axis population values, with data loaded from a CSV via `d3.csv` and rendered as SVG `<rect>` marks. The chart includes custom axis components for ticks and labels, with the population normalized to millions for readability.