A horizontal bar chart displays the populations of 30 countries in 2020, ranked by country name, with each bar's length proportional to its population value. The visualization loads CSV data from a GitHub repository and renders using React with SVG. D3 v5 APIs including `scaleBand`, `scaleLinear`, and `csv` handle data loading and scaling, while custom React components define the axes and marks. The chart features a blue axis line, green bars, and formatted tick labels that convert values into billions.