This bar chart shows the populations of the ten most populous countries in the world, based on 2020 data from the United Nations. Using D3 v5, the visualization employs `d3.scaleLinear` and `d3.scaleBand` to map population values and country names, with `d3.axisLeft` and `d3.axisBottom` for the axes. Data is loaded from a CSV file via `d3.csv`, and rectangles are appended to an SVG to represent each country, styled with a steel blue fill.