This example demonstrates a force-directed graph visualization using D3's `d3.forceSimulation` and `d3.forceLink` to position nodes and links based on simulated physical forces. The code renders the network with SVG circles and lines, updating positions each tick. It loads data from a static JSON file containing nodes and edges, and implements basic drag interaction via D3's `d3.drag`. The visualization highlights how force layouts distribute connected elements to reveal community structure.