A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It tells us about President Arling's economic program. This is an important start because it sets the stage for what will follow. It does not use any words that need prior context. Why other lines are not chosen? The other paragraphs do not work as the first sentence. For example, Paragraph 2 starts with 'It', which is a pronoun and needs context. Paragraph 3 starts with 'This', which also needs context. Paragraph 4 starts with 'The', which refers to a specific group without prior mention. Paragraph 5 starts with 'They', which is a pronoun that needs earlier information.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion. It gives the final details about what is needed to support the economic program. It summarizes the actions that are important for the program.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it explains what the economic program includes. This is a logical order because it goes from the introduction of the program to details about it. This follows the Broader to Specific Strategy.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it explains why the program is important. It shows the need for the changes mentioned in Paragraph 2. This follows the Cause and Effect Relationship.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it shows who supports the changes needed. It gives information about the political support for the program. This follows the Logical Order.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 because it explains what the liberal wing wants to do. It gives specific actions they support. This follows the Topic Example Strategy.