If you wonder about the adaptive purpose of a common behaviour (such as toddlers following their mothers around or teenagers wanting more independence from their parents) your wondering would be MOST consistent with the principles of

A) cultural psychology.
B) humanism.
C) biological psychology.
D) evolutionary psychology.

Evolutionary Psychology

A theoretical approach in psychology that attempts to explain useful mental and psychological traits as the functional products of natural selection.

Adaptive Purpose

Refers to the ways in which behaviors or physical traits contribute to an organism's survival or reproductive success in its environment.

Common Behaviour

Actions or reactions that are frequently exhibited by a majority of individuals within a particular group or society.