This visualization shows a simple social network of seven people as a force-directed node-link diagram, where yellow links connect black circles labeled with red names. The chart uses `d3.layout.force()` to position nodes with gravity, charge, and distance parameters, and `d3.json` loads the network data from `data.json`. Nodes and links are rendered as SVG elements, with dragging enabled via `force.drag` and positional updates applied during each tick. The background is grey, and the layout runs on a 1000x600 pixel canvas.