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 story. It gives a broad overview of what the story is about without going into details. It does not use any pronouns or definite articles that need prior context. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "To get a head start," which shows it is not independent. Paragraph 3 starts with "Even though he was tired," which also shows it is not independent. Paragraph 4 starts with "Late in the afternoon," which means it needs earlier context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the story. It shows the farmer's realization about the condition he must meet. It brings together the main points of the story.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the story. It shows what the farmer did after the offer. This is a logical order because it goes from the story's introduction to the farmer's actions.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it shows what happened next. The farmer kept going even when he was tired. This shows a cause and effect relationship. He wanted to gain more wealth, so he continued.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it shows what the farmer realized later. It follows a logical order. After working hard, he understood the condition he had to meet.