This example displays a horizontal bar chart comparing the 2020 population of 30 countries, using a categorical y-axis for country names and a linear x-axis for population values. The visualization is built with React and D3 v5, using `scaleBand` and `scaleLinear` for positioning, with axes rendered via custom React components. Data is loaded asynchronously from a remote CSV file using D3’s `csv` function and formatted with the `format` API to display values in billions. The bars are drawn as SVG rectangles with tooltips showing exact population values.