This interactive bar chart displays the number of students enrolled per module, with the top 20 modules sorted in descending order. A dropdown menu filters the dataset by department (CSIS, CAM, or GAV), recalculating student counts and resorting the bars accordingly. Built with React and D3 v5, it uses `scaleBand` and `scaleLinear` for axes, `d3.nest()` for aggregation, and SVG `rect` elements with tooltips. The chart loads data from a remote CSV file and updates dynamically when the department selection changes.