First sentence: Why this is the first line? This paragraph is the first because it introduces the main topic about computers in modern life. It gives a broad overview of how computers influence many areas. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs do not qualify as the first sentence. - Paragraph 2 starts with 'Initially,' which is a transitional word, so it is not independent. - Paragraph 3 starts with 'As,' which is also a conjunction, making it not independent. - Paragraph 4 starts with 'Consequently,' a transitional word, so it is not independent.

Concluding sentence: Why this is the last line? This paragraph is the last because it wraps up the discussion about computers. It shows the final impact of the changes in technology. This follows the Conclusive Words rule, as it uses 'Consequently' to show the result.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives background information about computers. This follows the Broader to Specific Strategy. The first paragraph talks about the importance of computers, and the second explains how they started.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it shows how computers changed over time. This follows the Chronological Order rule. The second paragraph talks about the early days of computers, and the third explains their evolution.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it shows the result of the changes in computers. This follows the Cause and Effect Relationship rule. The third paragraph explains how computers became better, and the fourth shows how this affects people.