This example displays a horizontal bar chart of country populations for 2020, with each country labeled on the y-axis and population values on the x-axis. The visualization uses React with D3 v5, employing d3.scaleBand for the categorical axis, d3.scaleLinear for the quantitative axis, and d3.format to abbreviate large numbers (e.g., converting billions to "B"). Data loads asynchronously via a custom useData hook, while custom AxisBottom, AxisLeft, and Marks components render the SVG elements. Styling includes green bars, blue tick lines, and a Poppins font family.