This example combines a force-directed graph with an adjacency matrix to visualize network connections. The graph uses `d3.forceSimulation` with `forceLink`, `forceManyBody`, and `forceCenter` to position nodes, while links are drawn as SVG lines with widths proportional to edge values. Clicking a node highlights its corresponding row and column in the matrix, and both elements support zooming via `d3.zoom`. Node colors and radii encode group membership, with a legend showing the six group categories.