This example presents two related visualizations: a force-directed network graph and a hierarchical family tree, both built with D3.js v7 and rendered as SVG. The network graph uses `d3.forceSimulation` with link, charge, and centering forces to position named nodes connected by red links, while labels update on each tick. The family tree applies the `d3.tree` layout to structural parent-child data. Both charts share a consistent dark red and green color scheme, with data hardcoded as JavaScript arrays.