This example displays a horizontal bar chart of country populations using D3.js, with bars rendered as SVG rectangles. The chart scales bar widths linearly against population values and positions them along a band scale for country names. The code imports specific D3 modules (`select`, `csv`, `scaleLinear`, `max`, `scaleBand`) to load data from a CSV file, parse population numbers, and bind the data to rectangle elements. Each bar’s height is set by the band scale’s bandwidth, creating a simple, clean visualization of comparative country sizes.