This example shows a horizontal bar chart ranking the ten most populous countries in 2021, with labeled axes for population counts and country names. It loads UN population data from a CSV file using D3’s `csv` utility, then passes the parsed data to React state. React renders the SVG, while D3’s `scaleBand` and `scaleLinear` position bars and ticks, and `xScale.ticks()` generates gridline labels. The chart is fully SVG-based, with a margin group translating the plot area.