A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main idea of the text. It sets up the topic of wildlife and how we see different animals. This is a broad overview of the subject. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'Take', which is a conjunction. Paragraph 3 starts with 'Worms', but it refers back to the idea of wildlife without introducing it. Paragraph 4 starts with 'But', which is also a conjunction. Therefore, they do not qualify as independent sentences.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the main idea of the text. It summarizes the importance of worm conservation and connects it to human survival. This gives a clear conclusion to the discussion.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives an example of the idea in Paragraph 1. The phrase 'Take the earthworm' shows a specific case of wildlife that is not seen as equal.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 continues the idea from Paragraph 2. It explains why earthworms do not get a 'cute response'. This shows a logical order from the example to the explanation of that example.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it gives a reason why worm conservation is important. The phrase 'But what Darwin rightly recognized' shows a contrast to the idea of worms not being cute, leading to a deeper understanding.