This radial bar chart displays the distribution of grades (A, B, C) across different anxiety levels, using concentric rings where each ring represents an anxiety level and each arc segment corresponds to a grade's proportion of the total. The visualization uses D3.js (v7) with SVG and animation, employing `d3.arc()`, `d3.scaleOrdinal()`, and `d3.csv()` to load and process data from a GitHub gist. Interactive tooltips and legend hover effects highlight grade-specific arcs using `transition()`.