Four nonprofit organizations are represented as large colored nodes in a force-directed network. Each main node connects to several smaller child nodes, which themselves branch into many tiny leaf nodes, illustrating organizational relationships and hierarchical structures. The visualization uses `d3.forceSimulation` with `forceManyBody` and `forceLink` to position nodes and links. Drag interactions are implemented via `d3.drag`, and all elements are rendered as SVG circles, lines, and text.