This bar chart visualizes population data for seven countries, with horizontal bars representing each nation’s population count. The chart is rendered as an SVG using React and D3 v6, employing `scaleLinear` for the x-axis and `scaleBand` for the categorical y-axis. Axis labels are generated with `axisLeft` and `axisBottom`, while data is bound to rectangles using D3’s selection API. The page loads D3 from a CDN and styles text elements via CSS.