A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first because it introduces the main topic of environmental conservation. It gives a broad overview of the growing awareness about this issue. This follows the rule of Topic Sentence. Why other lines are not chosen? Paragraph 2 starts with "Additionally," which is a conjunction, so it cannot be independent. Paragraph 3 starts with "This has prompted," which uses a pronoun that refers back to something else, so it is not independent. Paragraph 4 also starts with "This has prompted," which is not independent for the same reason.

Concluding sentence: Why this is the last line? This paragraph is the last because it wraps up the discussion by showing the actions taken by different groups. It reflects the overarching theme of environmental conservation and concludes the ideas presented.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the idea of awareness by showing how people are acting on this awareness. This follows the rule of Logical Order.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it shows a broader action taken by countries in response to individual choices. This follows the rule of Broader to Specific Strategy.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it explains the result of the policies mentioned in Paragraph 3. This follows the rule of Cause and Effect Relationship.