A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main idea about wonder. It explains that wonder is expensive and contrasts with security. This follows the rule of Topic Sentence, as it sets up the main topic without going into details. Why other lines are not chosen? The other paragraphs are not independent. For example, Paragraph 2 starts with 'Wonder is marvellous,' which is not general enough to stand alone. Paragraph 3 uses 'Of course,' which shows it needs prior context. Paragraph 4 starts with 'The Magian World View,' which assumes knowledge of the topic. Paragraph 5 starts with 'We have educated ourselves,' which also needs context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about wonder and education. It introduces the idea of the Magian World View and how it connects to science. This follows the Conclusive Words rule, as it brings together the earlier points.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the discussion about wonder. The word 'but' shows a contrast between the cost of wonder and its beauty. This follows the Contrast rule.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it explains the cost of wonder. The phrase 'we have paid a terrible price' shows the effect of the previous idea. This follows the Cause and Effect Relationship rule.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it shows the result of the price paid for education. It explains that education has led to a world without wonder. This follows the Logical Order rule.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it discusses the idea of the Magian World View. It shows how this view relates to the loss of wonder. This follows the Same Theme rule.