A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It clearly states that a compulsion is not the same as an addiction. This is an overview of the subject. It does not use any words that need prior context. Why other lines are not chosen? Paragraph 2 starts with "The former" which refers back to a previous idea, so it cannot be first. Paragraph 3 starts with "People" which is not general enough to stand alone. Paragraph 4 starts with "For instance" which shows it is giving an example, not an introduction.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it gives examples that summarize the topic of addiction. It wraps up the discussion by showing specific cases of what was talked about earlier.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it explains what is meant by "the former". This shows a logical order where the first paragraph introduces the idea and the second paragraph gives more detail.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it talks about people who have addictions. This shows a logical order where the second paragraph explains addiction and the third paragraph gives an example of how it affects people.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it gives examples of the types of addictions mentioned in the third paragraph. This shows a logical order where the third paragraph discusses behavior and the fourth paragraph provides specific examples.