This example presents the top 10 most populous countries as a horizontal bar chart, using population data from the United Nations World Population Prospects 2019. The visualization uses React with D3.js v5 utilities, employing `d3.scaleBand` for categorical y-axis positioning and `d3.scaleLinear` for the x-axis population scale. Each bar is rendered as an SVG rectangle with a tooltip showing the formatted population value, and custom Poppins typography styles the axes and labels.