A stylized bar chart displays the top 10 countries by population in 2020, using the UN Population 2019 dataset loaded via D3’s `csv` utility. React renders SVG marks, with `scaleBand` for the categorical y-axis and `scaleLinear` for the numeric x-axis. D3’s `format` abbreviates tick labels (e.g., “B” for billions). The chart includes a loading state and styled axes with an Oswald font.