This bar chart displays the top 10 most populous countries using data from the 2018 World Population Prospects estimate, with population values scaled by a thousand. The visualization customizes axes by formatting tick labels with `d3.format` to abbreviate large numbers, adding gridlines via tick sizes, and styling text elements through CSS. Built with D3 v6, it uses `scaleLinear` for the x-axis, `scaleBand` for the y-axis, and `axisBottom` and `axisLeft` to render the axes, while SVG rectangles represent bars.