A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic. It tells us about the boy and his situation. This is a general statement that does not need other sentences for context. It does not use any pronouns or definite articles that refer to previous ideas. Why other lines are not choosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "Moreover," which is a conjunction. Paragraph 3 uses "The consequence," which refers back to something else. Paragraph 4 also starts with "Moreover," and Paragraph 5 uses "He" which is a pronoun. All these reasons make them not independent.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the story. It explains what happened to the boy after discussing his problems. This gives a clear ending to the situation.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it adds more information about the boy. The word "Moreover" shows that it continues the idea from the first paragraph. This is a logical order because it explains what happened to the boy.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 because it explains the result of the boy studying in many schools. The phrase "The consequence is that" shows a cause and effect relationship. This helps us understand why he has problems.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it gives more details about the boy's problems. The word "Moreover" shows that it adds another point about his situation. This keeps the focus on his difficulties.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it explains why he was sent to his relatives. It shows a logical order where the problems lead to the action of sending him away. This helps us understand the boy's story better.