One of the three major concerns of developmental psychology involves a focus on

1. Nature and nurture.

2. Continuity and stages.

3. Stability and change.

Explanation:

Developmental psychology is the scientific study of how and why human beings change over the course of their life.  Developmental psychology currently focuses in the entire human being lifespan.

Developmental psychology examines our physical, cognitive, and social development and it focuses on three major issues:

So, the question is asking for one of the three major concerns of developmental psychology but since there are no options given, I've given you the three major concerns which developmental psychology focuses in.

so you know what happened be fore you were alive

explanation: