When we see two independent clauses joined by nothing at all we have detected a Run-on.
Answer is Run-on.( last choice)
Answer:
1. Main Idea: what is Caffeine addiction
1. Topic sentence: Have you ever wondered what it's like to deal with caffeine addiction
2. Main Idea: Pros and cons of caffeine addiction
2. Topic Sentence: Having a caffeine addiction my seem fun, but it is actually really bad for your health.
Explanation: