This force-directed network diagram visualizes a small social graph of six people and five weighted connections between them. Using data from a JSON file, circular nodes represent individuals, while lines with varying thickness encode relationship strength through the square root of each link's weight. The visualization is built with D3.js v4, employing the legacy `d3.layout.force` layout to position nodes and handle drag interactions. Node labels appear beside each circle, and the SVG renderer updates positions on every tick event, with CSS styling for link colors and node fills.