Drug Use and Abuse Case Study

I need an explanation for this Social Science question to help me study.

There are many different theories regarding the reasons that people become addicted to drugs and engage in substance abuse. Different theories may emphasize the biological, social, or psychological aspects of substance abuse. You are asked to compare two different theories of drug dependence. Some examples of these theories are the disease model, physical dependence model, and positive reinforcement model. You may also research other theories that address the question of why certain people become addicted to licit or illicit drugs. Choose two of the theories of addiction and write a report that covers the following information: 
A brief explanation of each theory 
An evaluation of the strengths and weaknesses of each      theory 
An identification of specific drug-addiction treatment      approaches that are compatible with each theory