This example visualizes a small social network of eight people and their friendship connections, using a force-directed graph layout. Node size is uniform, and all links are styled identically, though the underlying data includes a relationship type and a weight value. The visualization is rendered as an SVG using D3 v6, with `d3.forceSimulation` handling the layout physics, including link distance, charge, collision, and centering forces. Nodes are draggable, and hovering highlights a node with a green stroke. Data is loaded from an external JSON file.