This bar chart displays the top 10 most populous countries, with country names on the y-axis and population counts on the x-axis. The chart uses D3 v5’s `scaleLinear` and `scaleBand` to map data, `axisBottom` and `axisLeft` for axes, and SVG `rect` elements for bars. Population data is loaded from a CSV and scaled by a thousand. Axis ticks are styled with CSS, and the x-axis format converts large numbers to abbreviations like "B" for billions via D3's `format` function.