This example displays a horizontal bar chart of the top 10 most populous countries for 2019, rendered as SVG within a React application. The chart uses React for component structure and state management, with D3's `scaleBand` and `scaleLinear` to map country names and population values to visual positions. Axis ticks are generated via `xScale.ticks()`, and population data is loaded asynchronously from a CSV file using D3's `csv` function. The bars are drawn as `rect` elements, with axis tick marks and labels created from the scales.