This bar chart displays the top 10 most populous countries based on 2018 United Nations estimates, with population values from a CSV file scaled by 1,000. The visualization uses D3 v5’s `scaleLinear`, `scaleBand`, `axisBottom`, and `axisLeft` to render SVG bars, while customizing axes by removing domain lines, applying tick formatting that converts billions to “B” via `format('.3s')`, and adding axis labels. The chart also demonstrates styling tick text, gridlines, and the title through CSS classes.