This bar chart displays the ten most populous countries, using horizontal bars sorted by population. The React application loads data from the United Nations World Population Prospects 2019 via a CSV file, then renders SVG rectangles with d3.scaleBand and d3.scaleLinear. Axes are generated using d3.ticks and custom React components, with population values formatted using d3.format. The chart includes axis labels, tick marks, and tooltips, all styled with a Poppins font and a teal color scheme.