This bar chart displays the top 10 most populous countries, with horizontal bars representing each nation’s population. Built with React and D3 v5, it uses `scaleBand` for the categorical y-axis and `scaleLinear` for the population x-axis. The SVG rendering includes custom axes and marks, with tooltips formatted using D3’s `format` function. Data comes from the United Nations World Population Prospects 2019, loaded via D3’s `csv` parser.