A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of the assignment. It clearly states what is required in the course, which is to write a persuasive paper. This follows the rule of Topic Sentence, as it sets up the main topic without going into details. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone as the first sentence. For example, Paragraph 2 starts with 'The topic you choose...' which uses 'the' and assumes prior knowledge. Paragraph 3 starts with 'A requirement...' which is independent, but it is not the main topic. Paragraph 4 starts with 'The final draft...' which also assumes prior context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it provides the final information about the assignment. It wraps up the discussion by giving the deadline for the final draft. This follows the rule of Conclusive Words, as it summarizes the important point about when the work is due.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the discussion about the topic of the persuasive paper. This follows the Logical Order rule, as it flows from the requirement of the paper to what is needed for the topic.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it gives more details about how to support the topic. This follows the Broader to Specific Strategy, as it goes from the general idea of supporting the topic to specific guidelines on citing sources.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it talks about the deadline for the final draft. This follows the Logical Order rule, as it moves from the requirements of the paper to when it is due.