Decomposition stimulates single replacement but references double replacement.
Female( reproduction) stimulates embryo but references shell (protect).

Decomposition will remind single replacement how synthesis relates to double replacement, in return double replacement can remind decomposition that it is an action of chemical reaction.
Female( reproduction) will remind embryo how fertilize (male) relates to shell (protect), in return shell (protect) can remind female( reproduction) that it is an action of egg.

q1r stimulates q1s but references q1o.
q1r stimulates q1s but references q1o.

q1r will remind q1s how q1e relates to q1o, in return q1o can remind q1r that it is an action of q1n.
q1r will remind q1s how q1e relates to q1o, in return q1o can remind q1r that it is an action of q1n.