This example visualizes the top 10 most populous countries in 2020 using a horizontal bar chart rendered with React and SVG. Each bar’s length represents the population, with tooltips showing the formatted value. The chart uses D3’s `scaleBand` for the categorical y-axis and `scaleLinear` for the numeric x-axis, while custom React components (`AxisBottom`, `AxisLeft`, `Marks`) handle the ticks and bars. Data is loaded from a CSV via D3’s `csv` utility, and the axis label is positioned manually. The visualization demonstrates a clear separation of concerns by refactoring chart elements into modular, reusable components.