A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic about Gypsies. It gives a broad overview of who they are without needing other sentences for context. It does not use any pronouns or definite articles that refer to previous information. Why other lines are not chosen? The other paragraphs are not chosen because they do not meet the criteria for being independent. For example, Paragraph 2 starts with 'They', which is a pronoun that refers back to Gypsies, so it cannot stand alone. Paragraph 3 also uses 'they' and has a specific detail that needs context. Paragraph 4 starts with 'It', which is also a pronoun. Therefore, they are not independent.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about Gypsies. It provides historical context and explains the name they use for themselves. This is a summary style that brings together earlier points.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues to describe Gypsies. It gives more specific information about how they live and work. This follows the Broader to Specific Strategy.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it talks about how Gypsies are viewed by others. It shows a logical order of ideas, moving from their way of life to their social status. This follows the Logical Order strategy.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains the history of the term 'gypsies'. It gives background information that relates to how they are seen today. This follows the Cause and Effect Relationship strategy.