This stacked bar chart shows the distribution of movie ratings within different genres, with each segment representing the percentage of a specific rating level. Hovering over a segment reveals a tooltip displaying the exact percentage for that rating and genre. Built with D3.js v7, the visualization uses `d3.stack()` for data processing, `d3.scaleBand()` for the genre axis, and `d3.axisBottom()` for the percentage axis. The SVG renders color-coded rectangles, and the tooltip uses HTML positioning. The chart is based on rating data from the `iris.csv` dataset.