This bar chart displays the population of the top 10 most populous countries using 2018 UN estimates. The chart uses d3.csv, d3.scaleLinear, and d3.scaleBand to map population values to horizontal bar lengths and country names to vertical positions. Customized axes include a formatted tick label that converts large numbers to abbreviated units, horizontal grid lines, and a labeled x-axis. Each bar is colored according to a value in the data, and the chart includes a title and styled text elements.