This bar chart displays the population of the top 10 most populous countries, with data from the 2017 United Nations World Population Prospects (2018 estimates). The chart uses a vertical bar layout on a linear scale for population, with country names on the categorical axis. Built with D3 v5, the code uses `d3.scaleLinear`, `d3.scaleBand`, `d3.axisBottom`, and `d3.axisLeft` to construct the visualization. SVG rendering includes custom axes with tick formatting (e.g., "1.4B") and a styled title.