A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it gives a general statement about Internet use. It introduces the topic of Internet use by gender without needing other sentences for context. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'And', which is a conjunction. Paragraph 3 uses 'Addressing', which needs context. Paragraph 4 starts with 'Strategies', which also needs prior information.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion. It gives the final thoughts on what can be done about the issues raised earlier. This follows the Conclusive Words rule.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the topic of Internet use. It gives more details about who uses the Internet more. This follows the Logical Order rule.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it talks about the issue of digital divides. It explains why the information in Paragraph 2 is important. This follows the Cause and Effect Relationship rule.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it gives solutions to the problem mentioned in Paragraph 3. It shows what can be done about digital poverty. This follows the Broader to Specific Strategy.