A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces a strong idea about the feelings of members in a violent situation. It sets the stage for the topic of violence and its impact on outsiders. It does not refer to any previous information, making it independent. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'The situations', which needs context. Paragraph 3 starts with 'So', which is a conjunction. Paragraph 4 starts with 'Probably', which makes it uncertain and not a strong opening.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the discussion about violence and its rules. It gives a final thought on who uses force, which closes the topic. This follows the rule of Summary Style.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the discussion about violence. The first paragraph talks about feelings in violence, and the second explains how violence is defined. This shows a Logical Order.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 because it talks about the risk to outsiders. The second paragraph defines violence, and the third explains the risk, showing a Broader to Specific Strategy.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it discusses who uses force. The third paragraph talks about risk, and the fourth explains who might use force, showing a Logical Order.