This bar chart displays the populations of the world’s ten most populous countries, using data from World Population Prospects 2017. The visualization customizes both axes: the horizontal axis uses a linear scale with tick labels formatted via `d3.format` to abbreviate numbers (e.g., replacing ‘G’ with ‘B’), while the vertical axis removes the domain line and tick marks using D3’s `axisLeft` and `axisBottom`. Population values are multiplied by 1000 in the CSV loading step.