This example displays the populations of the top ten most populous countries as a horizontal bar chart. It customizes the axes by removing the default domain lines and using a custom tick format that converts large numbers into abbreviated forms like “B” for billions via D3’s `format` function. The bar chart is rendered with SVG, using `d3.scaleLinear` and `d3.scaleBand` for the x and y scales, `d3.axisBottom` for the x-axis, and `d3.axisLeft` for the y-axis. Data is loaded from a CSV file.