Reinforcement is the blank in a relationship

Reinforcement is essential in a relationship. When looking at the needs for happiness, the following is always vital. To have self-fulfillment, connection, progression and reflection. These are applicable to relationships as well.  Relationships thrive on mutual amounts of giving and taking.  Reinforcement in relationships can consist of providing these needs for happiness but in a healthy amount, as excessive amounts can lead to co-dependency.

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The correct answer is: a love

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