This example presents a minimal interactive visualization built with React, using D3’s force simulation to position and animate a set of nodes. The graph layout responds to user drag interactions, with link and node elements rendered as SVG paths and circles. The code leverages `d3.forceSimulation` for physics-based positioning and `d3.forceLink`, `d3.forceManyBody`, and `d3.forceCenter` to manage forces. It demonstrates how to integrate D3’s simulation lifecycle with React’s rendering cycle, updating positions on each tick without external data sources.