This stacked bar chart shows the number of delivery transactions for U.S. states, broken down by product category from a Superstore dataset. Users can select a region and toggle sorting to reorder bars by transaction totals. The visualization uses d3.csv to load data, d3.stack for layer composition, and d3.scaleBand/d3.scaleLinear for axes. Animated transitions via d3.transition update bar positions and heights when filters change, with SVG rectangles and text labels rendered dynamically.