Question: Chronic drug use does not occur in isolation-it gradually alters both the brain and behavior. Explain how repeated drug use can lead to addiction by analyzing key physiological factors (such as changes in brain chemistry, tolerance, and reward pathways) and psychological factors (such as reinforcement, emotional regulation, or co-occurring mental health issues). Use examples from course readings, research, or real-world contexts to support your analysis. In your response, you might consider: • How do tolerance and withdrawal influence continued use? • What role does the brain's reward system (e.g., dopamine) play? • How can psychological dependence differ from physical dependence? Need Assignment Help?