This bar chart displays population figures for 18 countries, with each bar’s length representing population in thousands and countries ordered along the vertical axis. The visualization uses D3 v5’s `scaleLinear` and `scaleBand` to map data to pixel coordinates, while `axisLeft` and `axisBottom` generate the labeled axes. Population data is loaded from a CSV file via `d3.csv`, and rectangles are appended to an SVG canvas, styled with a purple fill. The chart’s margins and inner dimensions are computed dynamically from the SVG’s width and height attributes.