This example demonstrates a horizontal bar chart of the top 10 most populous countries, with custom axis formatting. The x-axis uses `d3.axisBottom` with a tick formatter that abbreviates population values (e.g., converting billions to "B"), while the y-axis uses `d3.axisLeft` with grid lines removed. The chart is rendered as SVG using D3 v5, reading data from a CSV file, and applies styling via CSS classes for the title and axis labels.