This social network graph visualizes a small group of people as nodes with green circles and blue, arrow-tipped links representing friendships. The layout is computed using `d3.forceSimulation` with `d3.forceLink`, `d3.forceManyBody`, `d3.forceCollide`, and `d3.forceCenter`, while nodes are draggable via `d3.drag`. Friend connection strength is encoded by line thickness, based on the `value` field in the loaded `graph.json`. Hovering a node highlights it via CSS class changes, and all elements are rendered as SVG.