A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of Ancient Greece. It gives a broad overview of the time period after the Dark Age. It does not need any other sentence for context. It sets the stage for what follows. Why other lines are not chosen? Paragraph 2 starts with "He was the founder..." which uses a pronoun and needs context. Paragraph 3 starts with "However," which is a conjunction and needs a previous sentence. Paragraph 4 starts with "For the most part," which is also a phrase that needs context.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the discussion about Ancient Greece. It gives a final detail about Alexander the Great and his empire. It summarizes the main points made in the previous paragraphs.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the topic of Ancient Greece. It gives more details about how the civilizations were organized after the Dark Age. This shows a logical order from a general statement to a more specific one.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it shows a change in the situation of the city-states. The word "However" indicates a contrast. It explains what happened to the city-states later, which follows logically.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it explains who Alexander the Great was. It gives more information about him and the empire he founded. This shows a logical order from a specific event to details about the person involved.