This example displays the top 10 most populous countries as horizontal bars, with each bar’s length proportional to its population. Built with React and D3 v5, it uses `scaleBand` for the categorical axis, `scaleLinear` for the numeric axis, and `csv` to load data from the United Nations World Population Prospects 2019. SVG rectangles render the bars, with numeric tick labels formatted via `format`. The chart updates data through a custom `useData` hook, and includes axis components for layout.