Final answer:
The strategy for behavioral change that involves administering unpleasant or adverse outcomes to decrease undesired behavior is called 'Punishment'.
Step-by-step explanation:
The strategy for behavioral change that describes the administration of unpleasant or adverse outcomes as a result of undesired behavior is d) Punishment. In operant conditioning, punishment refers to a process that decreases the likelihood of a behavior by administering adverse outcomes or removing desirable ones. For instance, positive punishment involves adding an undesirable stimulus to decrease a behavior, like scolding a student to prevent texting in class. Conversely, negative punishment entails removing a pleasant stimulus to reduce a behavior, such as taking away a child's favorite toy when they misbehave.