This interactive stacked bar chart visualizes university ranking data from the Times Higher Education World University Rankings, displaying weighted scores across five categories: Teaching, Research, Citations, Industry Income, and International Outlook. The D3.js v6 code uses `d3.stack()` to compute stacked series and `d3.scaleBand()` for the x-axis, with `d3.axisLeft()` and `d3.axisBottom()` for axes. Hovering over legend circles highlights the corresponding segment by adjusting rectangle opacity via `svg.selectAll()`, while a user interface allows re-sorting bars by different metrics and ascending or descending order.