A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of corporate social responsibility. It does not refer to any previous information and sets the stage for the discussion. 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 'However', which is a conjunction. Paragraph 3 uses 'For him', which refers back to a person not introduced yet. Paragraph 4 starts with 'Putting aside', which is also a transitional phrase. Paragraph 5 starts with 'After all', which indicates it is not independent.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it summarizes the main points and provides a conclusion. It shows the positive outcome of being socially responsible, which wraps up the discussion. This follows the rule of Summary Style.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 using the Connector strategy. The word 'However' shows a contrast to the idea of social responsibility introduced in Paragraph 1.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 continues the idea from Paragraph 2 using the Logical Order strategy. It explains what Friedman believed, which is a direct follow-up to the views mentioned in Paragraph 2.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 using the Cause and Effect Relationship strategy. It discusses the problems with the views presented in Paragraph 3, showing a clear link.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 follows Paragraph 4 using the Broader to Specific strategy. It provides evidence that supports the idea that being socially responsible can also lead to profit, which is a direct response to the criticisms in Paragraph 4.