A Chain is a linear sequence of composites or relational units, ordered and connected at a shared depth to propagate relational dynamics across the sequence.
Chain arises from Tension — the structure that stabilizes distinct units in interplay. When multiple tension units are assembled into sequenced composites, the simplest configuration is a Chain: a linear ordering where each unit connects to the next at a shared reflexive depth.
Where Composition (from step 2) established that relational forms can be placed side by side into ordered wholes, Chain extends this to multiple units held in Tension. A Chain propagates relational dynamics across its length — what happens at one end can be carried through to the other.
When Chains interconnect in non-linear or branching patterns, they assemble into Networks.