This example models population trends by displaying the top 10 most populous countries as horizontal bars, ordered by rank. Using React for component state and D3 v5 for scales and SVG rendering, it loads United Nations World Population Prospects 2019 data via `d3.csv`. The code explicitly renders x-axis ticks with `scaleLinear.ticks()` and grid lines, while `scaleBand` positions each country’s bar, showing population values without a title or y-axis labels.