This bar chart displays the populations of the top 10 most populous countries using 2018 estimates from the United Nations World Population Prospects. The visualization uses D3 v5 with SVG rendering, employing `scaleLinear` for the x-axis, `scaleBand` for the categorical y-axis, and custom `axisBottom` and `axisLeft` ticks. Population values are formatted with abbreviations (e.g., "1.42B"), and the chart includes axis labels and a title, with gridlines created via tick sizing and styled steelblue bars.