Dividing will remind between how limiting relates to region, in return region can insure dividing that it is an active part of close.
Promote will remind target how demote relates to source, in return source can insure promote that it is an active part of promote-demote.

The purpose of close is between, and because it contains the concept of region, dividing and limiting are primary actions of close.
The purpose of promote-demote is target, and because it contains the concept of source, promote and demote are primary actions of promote-demote.

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

The purpose of q1n is q1o, and because it contains the concept of q1s, q1e and q1r are primary actions of q1n.
The purpose of q1n is q1o, and because it contains the concept of q1s, q1e and q1r are primary actions of q1n.