A stacked bar chart displays quarterly revenue across five product categories—Electronics, Furniture, Clothing, Toys, and Books—from Q1 2022 through Q2 2024. The chart uses D3 v7 to load CSV data, stack values with `d3.stack`, and render series as SVG rectangles with `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis. Color encoding uses `d3.schemeTableau10`, and each segment is labeled with its value. A separate SVG legend lists the five categories.