This bar chart displays the population of the top 10 most populous countries, based on 2018 estimates from the United Nations World Population Prospects. The visualization uses D3 v5 with an SVG rendering, employing `scaleLinear` for the x-axis and `scaleBand` for the y-axis. The axis is customized by removing default tick lines and domain, adding a formatted tick label that converts values to billions, and including a custom axis label and title. Data is loaded from a CSV file using D3’s `csv` function.