A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic about the wealthy people of Egypt. It gives a broad overview of the subject without going into details. It does not use any pronouns or definite articles that refer to previous information. Why other lines are not chosen? Paragraph 2 starts with 'But', which is a conjunction, so it cannot be independent. Paragraph 3 does not stand alone because it refers to 'papyri' without explaining what they are. Paragraph 4 also starts with 'But', which makes it dependent on previous information.

Concluding sentence: Why this is the last line? This paragraph is the last line because it concludes the discussion. It wraps up the ideas by stating that there are other interests beyond death, which reflects the overall theme of the text.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): This pair connects because the second paragraph gives more details about the topic introduced in the first paragraph. It explains the sources of information about death, which relates to the wealthy people mentioned before.
• Pair 2 (Paragraph 2 → Paragraph 3): This pair connects because the third paragraph continues the discussion about sources of information. It shows that papyri, which are also sources, mainly come from pyramid temples.
• Pair 3 (Paragraph 3 → Paragraph 4): This pair connects because the fourth paragraph introduces a contrasting idea. It shows that while death is a focus, there are other interests for the Egyptians.