A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of preparing for a job interview. It gives a broad overview of what is needed to succeed in an interview. It does not use any pronouns or definite articles that refer to previous ideas. Why other lines are not chosen? Paragraph 2 starts with "Researching" which is not a general statement. Paragraph 3 starts with "Practising" which is also not a general statement. Paragraph 4 starts with "On the day before" which refers to a specific time and is not independent. Paragraph 5 starts with "Finally" which is a conjunction and shows it is not independent.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the ideas about preparing for an interview. It uses the conclusive words "Finally" to show it is the end of the discussion.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the idea of preparation. It uses the logical order rule, as researching the company is part of the preparation process.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it continues to discuss preparation for the interview. It follows the broader to specific strategy, as practising questions is a specific part of preparing.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it discusses what to do the day before the interview. It follows the logical order rule, as preparing your outfit is part of the overall preparation.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 because it talks about what to do on the day of the interview. It uses the chronological order rule, as it follows the sequence of events leading up to the interview.