A bar chart displays the population of the ten most populous countries, with countries on the y-axis and population on the x-axis. The example demonstrates customizing axes: d3.axisBottom applies a tick format that converts large numbers to billions (replacing "G" with "B"), while the y-axis removes its domain and tick lines. Axis labels and a title are added via SVG text elements. Rendering uses SVG within a d3.v5 selection, with data loaded from a CSV file and scaled using d3.scaleLinear and d3.scaleBand.