A stylized horizontal bar chart displays 2019 UN population estimates for the top ten most populous countries, using the `scaleBand` and `scaleLinear` APIs from D3 v5 within a React component. Bars are rendered as SVG rectangles, with tooltips showing formatted values via the `format` function. The chart features custom tick styling, a Poppins font, and a color palette emphasizing orange bars against muted gridlines. Data is loaded asynchronously from a CSV via `fetch` and parsed with `csvParse`.