A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of screen technology. It is a general statement that does not need another sentence for context. It does not start with a conjunction or use a pronoun. It also does not use the definite article 'the' for a defined subject. Why other lines are not chosen? Paragraph 2 starts with 'However', which is a conjunction. Paragraph 3 starts with 'The evolution', which uses the definite article 'the' and assumes prior knowledge. Paragraph 4 also starts with 'However', which is a conjunction.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the discussion about screen technology. It shows the latest development and concludes the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 using the 'Connector' strategy. The word 'However' shows a contrast between the advancement of LCD technology and its decline.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 using the 'Logical Order' strategy. The idea of evolution continues from the decline of LCD to the rise of OLED technology.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 using the 'Broader to Specific Strategy'. The statement about OLED leads to the specific development of Micro LED technology.