This bar chart displays the population of the top 10 most populous countries, with countries listed on the y-axis and their population values extending horizontally. The data, sourced from a CSV file, is rendered as SVG rectangles using D3 v5. The code employs `d3.csv`, `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to construct the visualization, with tick labels formatted using `d3.format` and axis grid lines styled via CSS.