This bar chart displays the population of the top 10 most populous countries, based on 2018 estimates from the United Nations World Population Prospects. The visualization customizes D3 axes by removing domain lines, styling tick marks and labels, and adding a custom x-axis label and title. Using D3’s `scaleLinear` and `scaleBand`, the chart maps population values to bar widths and country names to vertical positions, with axis tick labels formatted using `format('.3s')` and converted from billions to a shorter notation. The SVG rendering includes styled grid lines and text elements via CSS.