This visualization presents a branching tree structure that traces the chain of related Wikipedia articles, beginning with the “Drug policy of South Korea” page. Using the D3.js library (version 3.x), the code renders an interactive node-link diagram in SVG, where each node represents a Wikipedia page title and links connect parent-child article relationships. The tree data is encoded as nested JSON, and the visualization applies CSS classes for node styling (with steel blue circles and gray links) to display the hierarchical connections. The layout is static, but nodes are interactive with a pointer cursor, suggesting the ability to explore the data structure.