This example displays the top 10 most populous countries as a bare bar chart with no axes, using rectangular bars whose widths encode each country’s 2020 population. It loads data from the UN World Population Prospects 2019 via `d3.csv` and sorts the first ten rows. The visualization uses React’s `useState` and `useEffect` to fetch and store data, then renders SVG rectangles positioned with `d3.scaleBand` on the y-axis and scaled with `d3.scaleLinear` based on the maximum population. The chart lacks labels, tick marks, or any annotation, emphasizing its intentionally minimal design.