This bar chart displays the top 10 most populous countries using 2018 population estimates from the United Nations World Population Prospects. It uses `d3.scaleLinear` for the x-axis and `d3.scaleBand` for the y-axis, with `d3.axisBottom` and `d3.axisLeft` to render axes. The x-axis tick labels are formatted with `d3.format` to abbreviate numbers like “1.42B,” and gridlines extend across the plot area. The chart is rendered as SVG, with countries labeled on the y-axis and population values shown as horizontal bars.