This interactive tree chart displays a family hierarchy, starting with "nellore pedda Reddy" and branching into descendants. The visualization uses a red background, with cyan nodes connected by blue links; nodes expand or collapse when clicked. The code leverages the D3.js library (version 3.5.17) with its `d3.layout.tree` and `d3.svg.diagonal` APIs to calculate the radial layout and draw curved paths. Rendered as an SVG with animated transitions, the chart updates node positions and link paths when the hierarchy structure changes.