This interactive tree diagram maps the Four Noble Truths and the eightfold path, using d3.layout.tree and d3.svg.diagonal to render an animated, collapsible hierarchy. Nodes and links are drawn as SVG elements, with pink-outlined circles and semi-transparent green paths, while clicking a node triggers a smooth transition via D3’s update function. The code includes mock parent properties like “Cars” and “Hyundai” that appear inconsistent with the Buddhist theme.