A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first because it introduces the topic of volunteering. It gives a broad overview of how people think about volunteering. It does not refer to any previous information. Why other lines are not choosen? Paragraph 2 starts with 'For example,' which is a connector. Paragraph 3 starts with 'In England and Wales,' which is specific and assumes prior knowledge. Paragraph 4 starts with 'They were almost twice more likely,' which uses a pronoun 'They' that refers back to a previous idea.

Concluding sentence: Why this is the last line? This paragraph is the last because it wraps up the discussion about volunteering. It gives a clear conclusion about the relationship between income and volunteering.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it uses the word 'For example.' This is a connector that shows it gives an example of the idea in Paragraph 1.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 logically because it gives specific data about volunteering in England and Wales. This is a 'Broader to Specific Strategy' where the general idea of volunteering is followed by specific statistics.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains the statistics from Paragraph 3. It shows a 'Cause and Effect Relationship' where the high income leads to a higher likelihood of volunteering.