A zoomable sunburst diagram displays the hierarchical structure of the Flare dataset, with nodes sized by value and colored by top-level category. Clicking a ring zooms into that subtree while decreasing visible depth. Built with D3 v5, it uses `d3.hierarchy`, `d3.partition`, and `d3.arc` for layout and rendering, with transitions via `transition.attrTween` to animate arc geometry and labels. The SVG visualization imports data through the Observable stdlib and includes interactive hover tooltips.