This bar chart shows the population of the top 10 most populous countries, with horizontal bars sorted by country name. The code uses d3.scaleLinear and d3.scaleBand for positioning, and d3.axisBottom with a custom tick formatter that converts large numbers to abbreviated units like "B" for billions. Axis gridlines extend across the plot area via negative tick sizes, while y-axis ticks and domains are removed for a cleaner look. Data loads from a CSV file and is multiplied by 1000 to reflect actual population figures.