This bar chart displays the ten most populous countries in 2020, with horizontal bars ranked by population size. Built with React and rendered as SVG, the visualization uses d3.scaleBand for the country axis and d3.scaleLinear for the population values. Data comes from the United Nations World Population Prospects 2019, formatted with d3.format to abbreviate large numbers. The chart includes a formatted x-axis, country labels on the y-axis, and tooltips showing exact values.