A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it gives a broad overview of the topic. It introduces the main idea about schools in the country. It does not need any other sentence for context. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not independent. Paragraph 2 starts with 'Do not ever choose,' which is a command and needs context. Paragraph 3 starts with 'You can see,' which refers to a specific action and needs more information. Paragraph 4 starts with 'Because,' which shows a reason and needs a cause. All these do not stand alone.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the ideas presented. It gives a final thought on why visiting schools is important. This follows the Conclusive Words rule, as it summarizes the importance of the previous points.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives advice based on the information in Paragraph 1. This follows the Logical Order rule. Knowing there are many schools leads to the need to visit them.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it explains what you can see when you visit a school. This follows the Broader to Specific Strategy. The advice in Paragraph 2 leads to the details in Paragraph 3.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains why seeing the facilities is important. This follows the Cause and Effect Relationship rule. The reason for visiting is to help with your study.