This bar chart displays the top 10 most populous countries using horizontal bars, with population values on the x-axis and country names on the y-axis. It uses D3 v6 with `scaleLinear` and `scaleBand` for scaling, `axisLeft` and `axisBottom` for customized axes, and `format` to abbreviate large numbers. The chart removes default axis lines, adds grid lines via tick sizes, and includes a title and axis label. Data comes from a CSV file with country and population values.