A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of One Health. It gives a clear starting point by mentioning when the term was developed and its relation to human diseases. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not independent. For example, Paragraph 2 starts with "The concept" which refers back to the term in Paragraph 1. Paragraph 3 starts with "One Health" which also needs context. Paragraph 4 starts with "It" which is a pronoun needing a subject. Paragraph 5 starts with "The rationale" which assumes prior knowledge of the topic.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it summarizes the importance of the One Health approach. It wraps up the discussion by explaining the rationale for its extension. This follows the Conclusive Words rule, as it provides a final thought on the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the discussion about the concept of One Health. This follows the Logical Order rule, as it builds on the information given in the first paragraph.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 links to Paragraph 2 because it explains what One Health recognizes. This follows the Broader to Specific Strategy, as it takes the general concept and gives specific details about its recognition of health connections.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it explains how One Health is applied. This follows the Logical Order rule, as it shows the progression from the recognition of interconnected health to the actions taken.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 links to Paragraph 4 because it gives a reason for the One Health approach. This follows the Cause and Effect Relationship rule, as it explains why the approach is important for complex diseases.