This bar chart displays the population of the top 10 most populous countries for 2018, using data from the United Nations World Population Prospects. It shows how D3 axes can be customized through the `axisLeft` and `axisBottom` functions. Each bar’s length corresponds to the population value, with a linear scale for the x-axis and a band scale for country names on the y-axis. The code explicitly removes tick lines and domain paths, and reformats tick labels using `format` to abbreviate large numbers.