Bar chart
This bar chart displays the population of the ten most populous countries, with country names on the y-axis and population values on the x-axis. It uses d3.csv to load population data from a CSV file, d3.scaleLinear and d3.scaleBand for scaling, and d3.axisLeft and d3.axisBottom for ticks. The SVG renders rectangles with a steelblue fill, and axis labels include a formatted tick scale that converts billions. The chart applies margins and a title, with grid lines created via tickSize.