A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of Haiti's independence. It gives a broad overview of Haiti's historical significance without needing prior context. It does not use any pronouns or definite articles that refer to previous information. Why other lines are not chosen? Paragraph 2 starts with "The former slaves..." which uses a definite article and refers to a specific group, so it is not independent. Paragraph 3 starts with "It was the first Spanish colony..." which uses a pronoun and assumes prior knowledge. Paragraph 4 starts with "The name comes from..." which also uses a definite article and assumes prior context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it provides a specific fact that wraps up the discussion about Haiti's history. It does not need further information and concludes the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it explains how Haiti gained independence. The logical order shows the cause of independence, which is the rebellion of the former slaves.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it provides background information about Haiti. It gives a broader context about the name of the country after discussing its independence.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it continues the discussion about Haiti's history. It shows a specific fact about Haiti being a Spanish colony, which follows the general information about its name.