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 text, which is about the burial customs of pharaohs in ancient Egypt. It does not refer to any previous information and sets the stage for the following details. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "The greatest of these..." which refers back to something not mentioned before, so it is not independent. Paragraph 3 starts with "It is more than..." which uses a pronoun that refers to the pyramid, needing prior context. Paragraph 4 starts with "The entire pyramid..." which also refers back to the pyramid. Paragraph 5 starts with "Moreover..." which is a conjunction and cannot be the first sentence.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about the pyramid and its purpose. It gives a final detail about the care taken in the burial process, which relates back to the main topic. This follows the Summary Style rule, as it brings together the earlier points about the pyramids.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it gives a specific example of the burial customs mentioned in Paragraph 1. This follows the Broader to Specific Strategy, where the first paragraph talks about pharaohs in general, and the second paragraph talks about the Great Pyramid specifically.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it provides more details about the Great Pyramid mentioned in Paragraph 2. This follows the Logical Order rule, as it continues the discussion about the same subject, giving specific facts about the pyramid.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it talks about the pyramid's structure after giving its measurements and construction details. This follows the Cause and Effect Relationship, as it explains what happened to the pyramid after it was built.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 because it discusses the care taken in the pyramid's construction, linking to the previous discussion about its materials. This follows the Connector Strategy, as "Moreover" shows that it adds more information related to the pyramid.