This example visualizes a small social network as a node-link diagram. The network graph shows eight people (nodes) and their “Friend with” relationships (links), with the link thickness between "july" and "tanu" indicating a higher connection value. The layout is generated by a force simulation, using `d3.forceSimulation` with link, charge, collision, and center forces to position nodes. The graph is rendered as SVG, with nodes as circles and links as lines with arrow markers, and users can drag nodes to explore the network.