This visualization shows a hierarchical tree with nodes displayed as red-bordered white boxes connected by green curved links, using sample data with a root node "MV" and children like "G1," "G2," and "G3." The code employs d3.v5's `tree` layout and `hierarchy` to position nodes, while `linkVertical` generates the paths between parent and child nodes. Each node renders as a `rect` and `text` element in SVG, with the viewport fixed to 900 by 300 pixels. Though zoom functionality is defined via `d3.zoom`, it remains commented out in the current example.