This example displays a horizontal bar chart of the top 10 most populous countries using 2020 UN population data, loaded via `d3.csv`. The chart renders custom axes with `scaleBand` for countries and `scaleLinear` for population values, drawing tick marks and labels directly. Built with React and D3 v6, it uses SVG elements like `rect` and `text` inside a transformed group to position bars and labels, with margins applied for layout.