Using React hooks and D3 v5, this visualization displays the top 10 countries by 2020 population as a horizontal bar chart. The SVG rendering uses `scaleBand` for the categorical y-axis, `scaleLinear` for the numeric x-axis, and custom React components (`AxisBottom`, `AxisLeft`, `Marks`) that call D3-axis ticks and scale methods. Data is loaded from a CSV via the `csv` promise API in `useData.js`.