Proponents of which major theoretical perspective believe that the keys to understanding development are observable behavior and outside stimuli in the environment?
a. behavioral
b. evolutionary
c. psychodynamic
d. cognitive

Psycho-dynamic

Explanation:

The psycho-dynamic approach was proposed by Sigmund Freud. He was a personality theorist. The psycho-dynamic theory includes all theories that focus on the personality, unconsciousness, behavioral and cognitive aspects of a person. Psycho-dynamic is also called an original psycho-dynamic theory.

Psychoanalytic is an approach that includes theories but psycho-dynamic includes theories as well as its followers. In these theories, it has been proposed that our emotions are strongly affected by unconsciousness. Our behavior is governed by our childhood experience. In this theory, it has been said that all behavior is determined and our personality is built up by three-component such as Id, Ego, and Superego.

answer; i do believe its (b) 12.5 years of age;

answer; they are called (pebbling);