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. It tells us about fishermen's knitted jerseys and how they are recognized. This is an introductory statement that sets the stage for the following details. Why other lines are not chosen? Other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'Traditionally' which is a conjunction. Paragraph 3 uses 'These' which refers back to the jerseys, so it cannot be independent. Paragraph 4 starts with 'This' which also refers back to something earlier. Paragraph 5 starts with 'It' which is a pronoun and needs context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about the jerseys. It gives the final reason for their popularity, which is the quality of the fabric. This is a Conclusive Words strategy as it summarizes the main point of the text.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives more details about the jerseys. This is a Broader to Specific Strategy. The first paragraph talks about the jerseys in general, and the second paragraph describes their specific colour and shape.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it talks about the same navy jerseys. This is a Topical Order. The second paragraph describes the jerseys, and the third paragraph tells us where we can see them.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains why the jerseys are popular. This is a Cause and Effect Relationship. The third paragraph states that the jerseys are common, and the fourth paragraph gives a reason for this.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it explains the reason for the popularity mentioned in the fourth paragraph. This is a Cause and Effect Relationship. The fourth paragraph says the popularity is not just tradition, and the fifth paragraph gives the actual reason.