A horizontal bar chart ranks 30 countries by total population in 2020, using green bars on a white background with blue axis ticks. The chart uses React with D3 v5’s `scaleBand` and `scaleLinear` to map data from a CSV hosted on GitHub, rendered as SVG `<rect>` elements. D3’s `format` function converts population values to abbreviated labels, and native SVG `<title>` elements provide hover tooltips.