This example shows a horizontal bar chart of population data for a list of countries, rendered as SVG rectangles. The chart scales bar width against the maximum population value and uses a band scale for the categorical country axis. It loads data from a CSV file using d3.csv and parses population values from strings to numbers. The implementation uses d3.scaleLinear, d3.scaleBand, and d3.max to compute the domain and range, and d3.select to append rectangles to the SVG.