This bar chart displays the population of the top 10 most populous countries, using a horizontal layout with steel-blue bars. The axes are customized: the y-axis removes its domain line and tick lines, while the x-axis uses a custom tick formatter via `d3.format` to abbreviate values (e.g., converting “G” to “B”) and includes grid lines extending across the chart. Built with d3.v5 and SVG, the code employs `d3.scaleLinear`, `d3.scaleBand`, `d3.axisLeft`, and `d3.axisBottom`. Population data is read from a CSV file and multiplied by 1000 to reflect actual counts.