This example displays the top 10 most populous countries as a horizontal bar chart with labeled axes. The chart uses React to manage state and render SVG elements, while D3 v5 provides data loading via `csv`, scales with `scaleBand` and `scaleLinear`, and generates axis ticks. D3’s `max` determines the x-axis domain from the United Nations World Population Prospects 2019 data, and margin conventions position the SVG groups for tick marks and labels.