A hierarchical tree graph displays the administrative divisions of India, from the root "India" down to cities like Hyderabad and districts such as JNTU. Nodes are rendered as colored circles, with each depth level assigned a distinct color, while green, animated paths draw the parent-child links. The visualization uses D3’s `d3.stratify()` to structure the data and `d3.tree()` to compute the layout, with SVG elements and transitions animating the node radii and link drawing. Data is provided as an inline array of parent-child pairs.