This visualization displays a bar chart of the top 10 most populous countries in 2020, using data from the UN Population dataset. Bars extend horizontally from the left, with each bar's length proportional to the country's population, and countries labeled along the vertical axis. The example integrates React 16.9.0 for the user interface and declarative rendering, while D3 v5.11.0 utilities (`csv`, `scaleBand`, `scaleLinear`, `max`) fetch the CSV data and compute the scales. Both libraries—React for component structure and D3 for data processing—output an SVG graphic.