This example shows a simple network graph with five labeled nodes (A–E) and four links connecting them. D3’s `forceSimulation` with `forceLink` and `forceManyBody` positions the nodes, while the tick event updates line and circle positions. The SVG rendering uses D3 selections with `join` to bind data to `<line>` and `<g>` elements, with node labels placed via appended `<text>`. The simulation runs continuously, repositioning nodes within a 200x200 center area.