Although Regina receives slightly greater rewards from her marriage than her husband, both are satisfied with the relationship because they each benefit in proportion to what they put into it. This BEST illustrates the significance of:

equity

Explanation:

Based on the information provided within the question it can be said that in this scenario this best illustrates the significance of equity. In the context of marriage, this term refers to the difference in authority, power, and influence between spouses in a marriage including finances. Meaning each spouse has a certain ownership of everything in the marriage depending on the amount they put into it.

using the scientific method.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.