Which of the following is a key characteristic of complementary relationships?

Complementary relationships are characterized by a dynamic where partners have different but mutually beneficial roles. In this context, providing support to one another signifies the idea that each person brings unique strengths to the relationship, which helps to foster each other's growth and wellbeing. This support often involves one partner taking on a more dominant or leading role while the other may offer support or follow, resulting in a balance that benefits both parties.

In contrast, the other concepts like equality among partners typically describe symmetrical relationships where partners share similar roles and power dynamics. Interdependence implies a reliance on one another, but does not inherently reflect the differentials in roles that define complementary relationships. Exchanging similar behavior pertains more to situations where partners mirror each other's actions, which is characteristic of symmetrical relationships rather than complementary ones.