A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of the life cycle of an ant. It gives a broad overview of how an ant starts its life. It does not refer to any previous information, so it stands alone. This follows the rule of Topic Sentence. Why other lines are not chosen? Paragraph 2 starts with "Eventually," which is a transitional word, so it cannot be first. Paragraph 3 starts with "At this point," which also shows it is not independent. Paragraph 4 starts with "As a pupa," which refers to a stage that needs prior context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the life cycle of the ant. It shows the final stage where the ant gets its adult features. This follows the Conclusive Words rule.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the story of the larva. It shows the next step in the life cycle. This follows the Logical Order rule.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it describes what happens after the larva grows. It shows a new action that the larva may take. This follows the Cause and Effect Relationship rule.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it describes what happens after the larva spins a cocoon. It explains the next stage in the life cycle. This follows the Logical Order rule.