A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of brand names. It does not refer to any previous information. It is a general statement about what a brand name should be. This follows the rule of Topic Sentence. Why other lines are not chosen? Paragraph 2 starts with "In other words," which is a transitional phrase. Paragraph 3 starts with "However," which is also a conjunction. Paragraph 4 starts with "So," which is another conjunction. All these sentences cannot stand alone without context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it gives an example of what was discussed before. It wraps up the ideas about brand names. It follows the rule of Summary Style, as it brings together the earlier points.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it explains what kind of brand name is ideal. This follows the Broader to Specific Strategy, as it gives more detail about the general idea in Paragraph 1.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it introduces a different idea about brand names. It shows a contrast with the word "However," which is a Connector. This indicates a shift in the discussion.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it gives an example of a good brand name. The word "So" is a Connector that shows this is a conclusion or result of the previous idea.