This social network graph visualizes friendships among a group of people, with nodes representing individuals and lines representing their relationships. The graph uses a force-directed layout powered by `d3.forceSimulation`, with link forces, charge repulsion, and collision detection to position the nodes. Data is loaded from a JSON file containing node IDs and link relationships. The visualization is rendered as SVG, with violet circles for nodes, labels showing names, and directional arrow markers on the links. Hovering highlights a node by changing its stroke width and color.