Four organization networks form a force-directed graph, with colored clusters of main nodes and smaller child nodes connected by links. The visualization uses d3's simulation API—`forceSimulation`, `forceManyBody`, `forceLink`, and `forceCenter`—to compute node positions, rendered as SVG circles and lines. Dragging nodes via d3's `drag` interaction repositions them, triggering the simulation to restart. Node colors come from a custom palette in `colors.js`, and the graph is built from static data in `data.js`.