This bar chart shows the population of the top 10 most populous countries, based on 2018 estimates from the United Nations World Population Prospects. The visualization customizes both axes: the y-axis removes its domain line and tick marks, while the x-axis formats tick labels (converting G to B) and adds a labeled axis. Built with D3 v5, the code uses `d3.csv`, `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to render the SVG chart.