A horizontal bar chart displays the ten most populous countries for 2020, with each country's bar length proportional to its population. The visualization loads population data from a CSV file hosted on GitHub and renders the chart as an SVG. The React application uses D3's `csv` parser, `scaleBand`, `scaleLinear`, and `max` functions to process the data and map values to bar dimensions. Bars are drawn as `rect` elements within a transformed SVG group, sized according to the computed scales.