This example shows a horizontal bar chart of the ten most populous countries, with a customized axis layout and formatting. It uses D3 v5 with `csv`, `scaleLinear`, and `scaleBand` to map population values and country names, while `axisBottom` and `axisLeft` render the axes. Axis ticks are formatted with `format(".3s")` to abbreviate numbers, and grid lines are styled via CSS. The SVG is drawn with `select` and appended `rect` elements, and the legend titles are added as text elements.