A bar chart displays population counts for the ten most populous countries, using data from the 2017 UN World Population Prospects. The chart customizes axes by removing domain lines, adding a population axis label, and formatting tick labels with d3.format to abbreviate numbers (e.g., converting G to B). Built with D3 v6, it uses scaleLinear and scaleBand for scales, axisLeft and axisBottom for axes, and SVG rendering.