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 research. It sets up the theme about how video games affect our brains. It does not use any words that need prior context. Why other lines are not chosen? Paragraph 2 starts with "They" which is a pronoun and needs context. Paragraph 3 starts with "The studies" which also needs prior information. Paragraph 4 starts with "For example" which shows it is giving an example and not introducing a new idea.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it gives a specific example that wraps up the discussion about how video games affect our brains. It does not introduce new ideas but summarizes the effects mentioned earlier.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it continues the idea of research. The phrase "They collected the results" shows that the research mentioned in Paragraph 1 is being explained further. This is a Logical Order.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it talks about the findings from the studies mentioned. The phrase "The studies show" indicates that it is giving results from the studies collected in Paragraph 2. This is a Broader to Specific Strategy.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it gives an example of how video games affect attention. The phrase "For example" shows that it is providing a specific case related to the general findings in Paragraph 3. This is a Topic Example.