An interactive force-directed graph with draggable nodes and links, rendered as SVG in React using D3 v4's `d3.forceSimulation`. The visualization includes controls for adjusting the simulation’s center, charge, collide, forceX, and forceY parameters via sliders and checkboxes, with a live alpha activity bar. The graph's node positions update in real time as forces are modified, demonstrating how each force affects layout.