This interactive tree diagram displays a hierarchical decision flow for faced questions, with nodes representing statuses like "Visit," "Attempted," "Correct," and "Incorrect." Users click any node to collapse or expand its children, triggering smooth animated transitions. The visualization uses D3 v5's `tree` and `hierarchy` layouts alongside `linkHorizontal` for curved edges, with SVG rendering and zoom/pan support via `d3.zoom`. Node colors and labels are driven by embedded JSON data, and transitions are handled through D3’s `.transition()` methods with configurable durations.