This interactive tree visualization, built with D3 v3, displays a hierarchical taxonomy of data analysis techniques rooted at "Messy data," with branches for exploratory data analysis (EDA) and its subcategories (univariate, bivariate/multivariate). Users can drag and drop nodes to reorganize the tree, click nodes to expand or collapse children, and pan/zoom the entire diagram. The layout is rendered as an SVG using a D3 tree layout with diagonal links, and includes smooth animations for node transitions and drag interactions. Data is loaded from a JSON file, and the visualization supports dynamic restructuring through mouse events.