This bar chart displays the population of the top 10 most populous countries using 2018 estimates from the United Nations World Population Prospects. The visualization customizes both axes: the y-axis removes domain and tick lines for a cleaner look, while the x-axis applies a custom tick format that converts large numbers into abbreviated labels and draws grid lines across the chart. Built with d3.v5, the code uses d3.scaleLinear, d3.scaleBand, d3.axisBottom, and d3.axisLeft to render SVG elements. Population values are multiplied by 1000 during data loading from a CSV file.