This bar chart displays the population of the top 10 most populous countries using 2018 United Nations estimates, with population values in thousands and country names along the y-axis. It shows how D3 axes can be customized in v5 by using `axisLeft` and `axisBottom` paired with `scaleLinear` and `scaleBand`. The example removes default axis domains and tick lines, formats population tick labels with `format('.3s')` to abbreviate billions, and adds custom title and axis-label text. Rendering is done through SVG, with styling applied via externally linked CSS.