This stacked bar chart shows the percentage distribution of student grades across five rating intervals for different genres, revealing how grade categories vary by genre. The visualization uses D3 v7's stack, scaleLinear, scaleBand, and axis methods to construct the horizontal bars, with SVG rendering. Hovering over a segment triggers a custom tooltip displaying the exact percentage via a mouseover event handler. The data comes from a CSV file containing grade percentages per genre, with total proportions summing to 1. A color scale maps rating intervals to distinct hues.