This example visualizes a social network as an interactive force-directed graph. Eight people are connected by friend relationships, with each node represented by a colored circle and its name label. The graph uses D3 v6’s `d3.forceSimulation` with link, charge, collision, and center forces to position nodes, while SVG `<line>` elements with arrow markers depict the connections. Users can drag nodes to reposition them, and hovering highlights a node with a green stroke. Data is loaded from a JSON file containing node and link arrays.