A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main idea about violence. It is a general statement that does not need other sentences for context. It does not use any pronouns or definite articles that refer to previous ideas. Why other lines are not chosen? Paragraph 2 starts with 'For example,' which is a conjunction. Paragraph 3 starts with 'Thus,' which is also a conjunction. Paragraph 4 starts with 'However,' which is another conjunction. All these sentences cannot stand alone as the first sentence.

Concluding sentence: Why this is the last line? This paragraph concludes the discussion about violence. It uses 'However' to show a final point. It wraps up the ideas by stating that responding to verbal violence is not justified.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 gives an example of the idea in Paragraph 1. This is a 'Topic Example' strategy because it shows a specific case that supports the general idea of justification of violence.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 continues the idea from Paragraph 2. It uses 'Thus' to show a logical connection. This is a 'Connector Strategy' because it links the example to a broader statement about responding to violence.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 contrasts with Paragraph 3. It uses 'However' to show a different idea about violence. This is a 'Contrast' strategy because it presents a different view on responding to verbal violence.