A stacked bar chart displays the percentage distribution of five rating levels across different vegetables, with each bar segment colored by rating category and totaling 100%. Hovering over a segment highlights it and reveals a tooltip with the exact percentage for that vegetable and rating level. The visualization uses D3 v7’s `d3.stack()`, `d3.scaleOrdinal`, `d3.scaleLinear`, and `d3.scaleBand` to encode data from a CSV file, rendering segments as SVG rectangles with mouse event handlers for interaction.