A horizontal bar chart displays the populations of the world's most populous countries, sorted by rank. The example customizes both axes: the y-axis removes domain lines and ticks, while the x-axis formats population values with d3.format and replaces "G" with "B" for billions. Built with D3 v5 in React, it uses scaleLinear, scaleBand, axisBottom, and axisLeft to render SVG elements, with data loaded from a CSV file.