This social network graph visualizes relationships between eight people, with varying link thickness indicating stronger connections (value 1 vs. 5) and arrowheads marking directed edges. The SVG rendering uses d3.forceSimulation with link, charge, collision, and center forces to position nodes, which users can drag interactively. Node highlighting via the `.nodeHover` CSS class occurs on mouseover. The code loads D3 v6 from UNPKG and reads relational data from a local `data.json` file, demonstrating ES6 module imports alongside the main visualization logic.