This example shows a social network graph of people connected by friendship links. Each person appears as a brown circle with a name label, and directional lines with arrow markers indicate the relationship between individuals. The graph is built with D3.js, using `d3.forceSimulation` with link, charge, collision, and center forces to position nodes dynamically. Users can drag nodes to rearrange the layout, and hovering highlights a node with a thicker white stroke. The data comes from a JSON file with node and link arrays, and the visualization renders to SVG.