This example demonstrates a small network graph with six nodes (Alice, Bob, Carol, David, Eve, Frank) connected by five links, rendered as blue circles and gray lines in an SVG. It uses d3.forceSimulation with forceLink, forceManyBody, and forceCenter to compute positions, and tick event handlers to update node, link, and label coordinates. Data comes from inline JavaScript arrays, and the code is written with plain D3 v7, with no React logic applied to the visualization itself.