This bar chart shows the top 10 most populous countries, using 2018 estimates from the United Nations World Population Prospects. It demonstrates custom axis styling and tick formatting with `scaleLinear` for the population axis and `scaleBand` for country categories. The code uses D3 v5’s `csv` loader to read data from `data.csv`, and the SVG is rendered with `axisBottom` and `axisLeft` guides, with tick marks extended across the plot area. The chart also adds custom labels and a title via SVG text elements.