A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of time management. It explains that time is limited and how we use it is important. This is a general statement that sets the stage for the rest of the text. It does not refer to any previous information, so it is independent. Why other lines are not chosen? Paragraph 2 starts with "Effective time management" which is specific and assumes prior knowledge. Paragraph 3 starts with "By mastering time management" which also assumes knowledge of time management. Paragraph 4 uses "In conclusion" which shows it cannot be first.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it summarizes the main points of the text. It uses the phrase "In conclusion" which signals that it is wrapping up the discussion about time management.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it explains how to use time well. The first paragraph talks about the importance of time, and the second paragraph gives ways to manage it. This shows a logical order.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 because it explains the benefits of effective time management. The second paragraph talks about what effective time management is, and the third paragraph shows what can happen when you master it. This is a broader to specific strategy.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 concludes the text by summarizing the importance of time management. The third paragraph talks about achieving goals through time management, and the fourth paragraph wraps up by stating its overall value. This shows a logical order from claim to conclusion.