This bar chart displays the populations of the world’s ten most populous countries, based on 2018 estimates from the United Nations World Population Prospects. The visualization uses D3 v5 with SVG rendering, building on a tutorial by Curran Kelleher. It demonstrates customizing axes by applying a `scaleBand` for country labels and a `scaleLinear` for population values, using `axisBottom` and `axisLeft` with custom tick formatting that abbreviates numbers (e.g., converting “G” to “B” for billions). The chart also removes default grid lines and adds styled axis labels and titles via CSS.