A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main idea of planning for a weekend getaway. It sets up the topic without going into details. It is a general statement about the importance of planning. Why other lines are not chosen? Paragraph 2 starts with "After selecting" which means it needs a prior context. Paragraph 3 starts with "Checking the weather" which also needs context. Paragraph 4 starts with "Finally" which shows it is not the first. All these sentences do not stand alone.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it concludes the planning process. It uses the word "Finally" which signals the end of the discussion about planning for a weekend getaway.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the idea of planning. It shows what to do after planning, which is selecting a destination. This is a logical order.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it follows the idea of preparation. After researching, checking the weather is the next step. This shows a logical order.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it shows the last step in planning. After checking the weather, booking accommodations is the final action. This is a logical order.