This bar chart visualizes the top 10 most populous countries, with population values read from a CSV file. It uses a D3 v5 linear scale for the horizontal axis and a band scale for the vertical country categories, rendered as SVG rectangles. The code employs `d3.csv`, `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom`, with custom tick formatting to abbreviate large numbers. A title and axis label are added as SVG text elements, and the chart is styled via CSS classes.