A force-directed network diagram shows friendship ties among eight people, with nodes representing individuals and directed links labeled by relationship type. The graph is rendered as an SVG using D3 v6, driven by `d3.forceSimulation` with link, charge, collision, and centering forces. Node positions update on each tick, and users can drag nodes via `d3.drag` to rearrange the layout. Node hover states and arrowhead markers on links enhance readability. Data comes from a local `data.json` file, and the visualization uses a single blue color scale for all nodes.