This interactive tree diagram visualizes a hierarchical family tree, showing relationships between individuals such as “venkat reddy” and their descendants. The visualization uses D3.js version 3.5.17 with a collapsible node layout, where clicking a node toggles the display of its children. The SVG rendering includes red circular nodes connected by green diagonal links, with text labels positioned to the left or right of each node. Animations transition nodes and links smoothly when expanding or collapsing branches, using the `d3.layout.tree` and `d3.svg.diagonal` APIs.