[Solved] Which assumption is fundamental to understanding how significant social relationships influence development? A) Characteristics stay stable as individuals progress through time. B) People contribute actively to their development. C) Development is based on physiological change in humans. D) Individuals' development occurs as a type of adaptation to the environment. Social Learning: The process of acquiring new behaviors through observation and imitation of others. Pornographic Films: Visual material intended to arouse sexual excitement through explicit depictions of sexual acts. Modeling: A learning process observed in social learning theory where individuals learn behaviors, attitudes, and values through observing others. Human Motivational Forces: Intrinsic and extrinsic factors that influence a person's behavior and actions towards achieving a goal.