Barchart
A horizontal bar chart ranks ten countries by population, using D3 v5 to load CSV data and render an SVG. The visualization employs `d3.csv`, `scaleLinear` for the x-axis population values, and `scaleBand` for the categorical y-axis, with axes generated via `axisLeft` and `axisBottom`. Bars are drawn as SVG rectangles filled with steelblue, and the code demonstrates ES6 module imports from D3 and local files.