A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It sets the stage for the discussion about work and personal life. It does not need any other sentence for context. It gives a broad overview of the issue. Why other lines are not chosen? Paragraph 2 starts with "Modern technology" which is specific and needs context. Paragraph 3 starts with "This constant connectivity" which refers back to something not yet mentioned. Paragraph 4 starts with "As a result" which shows it is dependent on previous information.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion. It summarizes the main point about the struggle to balance work and personal life. It reflects the overall theme of the paragraphs.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): This pair connects because the first paragraph introduces the blurred lines between work and personal life. The second paragraph explains how modern technology causes this issue. This shows a logical order from a general statement to a specific example.
• Pair 2 (Paragraph 2 → Paragraph 3): This pair connects because the second paragraph talks about technology allowing constant work connection. The third paragraph explains the negative effects of this connectivity. This shows a cause and effect relationship.
• Pair 3 (Paragraph 3 → Paragraph 4): This pair connects because the third paragraph discusses the negative impact of constant connectivity. The fourth paragraph shows the result of this impact, which is the difficulty in balancing work and personal life. This shows a logical order from problem to consequence.