Final answer:
The correct answer to the analogy 'obsession is to compulsion' is 'C. Cognition; behavior', as obsessions are internal like cognitions, and compulsions are external like behaviors.
Step-by-step explanation:
The analogy 'obsession is to compulsion as ______________ is to ______________' requires us to think about the relationship between these two ideas. Obsessions are persistent, unwanted thoughts, images, or urges that cause distress or anxiety, which are typically internal and cognitive. Compulsions are repetitive behaviors or mental acts that an individual feels driven to perform in response to an obsession or according to rigid rules, which are typically external and behavioral.
Given this understanding, the correct analogy would be Cognition; behavior. So the answer to the analogy should be 'C. Cognition; behavior'. Here, cognition relates to internal thoughts (similar to obsessions), and behavior relates to the outward actions taken in response to those thoughts (similar to compulsions).