This example shows a force-directed organization graph with a single parent node, two child nodes, and a cluster of leaf nodes, rendered as gray circles with text labels and black connecting lines in an SVG. Using `d3.forceSimulation` with `forceManyBody`, `forceLink`, and `forceCenter`, the layout is computed on each tick, updating circle and line positions. The data is defined in a separate JavaScript module with nodes and links arrays. The parent node is larger, while child and leaf nodes shrink progressively in size.