This visualization displays a horizontal bar chart of population data for the top 20 countries in 2010, sorted in descending order. The chart uses D3.js (v5) with React to render SVG rectangles, where bar length encodes population values and the y-axis lists country names. The code employs `scaleBand` and `scaleLinear` from D3 for axes, with data loaded from a CSV via `d3.csv`. Axis ticks are styled with yellow lines, and tooltips show formatted population values when hovering over bars.