This example visualizes the top 10 most populous countries using a horizontal bar chart, with each bar’s length proportional to its 2020 population estimate from the United Nations World Population Prospects 2019 dataset. The chart displays axis tick labels and grid lines created manually with React components, while D3’s `scaleBand` and `scaleLinear` handle positioning and scaling. The data is loaded via `d3.csv`, and rendering uses SVG elements within a React component that manages state through hooks like `useState` and `useEffect`.