A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of food waste during holidays. It gives a broad overview of the issue without going into details. It does not use any pronouns or definite articles that need prior context. Why other lines are not chosen? Paragraph 2 starts with "But" which is a conjunction, so it cannot be independent. Paragraph 3 starts with "Solutions" which is specific and does not introduce the topic. Paragraph 4 starts with "The good news" which is also specific and does not set the topic. Paragraph 5 uses "This is based on data" which refers to prior information, making it not independent.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion by providing data that supports the earlier points. It summarizes the main theme of food waste and gives a clear conclusion.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): The second paragraph connects to the first because it offers a positive note after discussing the problem of food waste. This shows a logical order from problem to solution.
• Pair 2 (Paragraph 2 → Paragraph 3): The third paragraph continues the idea from the second paragraph. It explains that the solutions mentioned are easy for everyone to access. This shows a logical order from good news to specific solutions.
• Pair 3 (Paragraph 3 → Paragraph 4): The fourth paragraph adds a challenge to the solutions given in the third paragraph. It shows that even with easy solutions, there are still difficulties. This creates a cause and effect relationship.
• Pair 4 (Paragraph 4 → Paragraph 5): The fifth paragraph provides evidence for the challenges mentioned in the fourth paragraph. It uses data to support the claim about food waste, showing a logical order from challenge to evidence.