This example shows a horizontal bar chart of the ten most populous countries, with bar lengths proportional to each country's population. It uses D3 version 5 APIs including `select`, `csv`, `scaleLinear`, `max`, and `scaleBand` to load data from a CSV file, compute scales, and render SVG rectangles. The chart applies a linear scale to population values and a band scale to country names, with bars drawn inside an SVG element with fixed dimensions and a margin offset.