A horizontal bar chart displays the populations of the ten most populous countries, with values in thousands and bars sorted from largest to smallest. The chart uses D3 v5’s `scaleLinear` and `scaleBand` to map data to positions, while `axisLeft` and `axisBottom` generate the axes. Axis lines are removed via selection, and tick labels are formatted with `format('.3s')` to abbreviate numbers, replacing “G” with “B” for billions. Population data comes from a CSV file, and the visualization renders as SVG.