This zoomable sunburst chart visualizes the hierarchical flare dataset, where each ring segment represents a category and its size reflects the summed value of its children. Clicking an arc smoothly zooms into that node, re-scaling the partition layout and labels. Built with D3 v5, it uses `d3.partition`, `d3.hierarchy`, `d3.arc`, and `d3.interpolate` within a `transition.attrTween` animation, rendering as SVG with zoom transitions triggered by click events. The flare data is loaded via the Observable standard library’s `require` method.