Commonly abused drugs, such as cocaine, amphetamine, heroin, nicotine, marijuana, and alcohol, activate pleasure pathways within the . system

I'm pretty sure it's the limbic system.

Explanation: The limbic system is a part of the brain that deals with three major functions: Emotions. Memories. Arousal.

answer; ///the declaration of independence;

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;