This example displays the top 10 most populous countries as horizontal bars, with axis ticks and labels rendered manually. The React component loads data from the UN World Population Prospects 2019 CSV via `d3.csv`, then uses `scaleBand` and `scaleLinear` to position bars and axes. D3’s `xScale.ticks()` generates grid lines, while SVG text elements draw tick labels. Rendering is done through React’s JSX within an SVG, replacing D3’s direct DOM manipulation.