A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first because it starts with 'To begin,' which shows it is an introduction. It tells us what we need before we start cooking. This follows the rule of Introduction. Why other lines are not chosen? Paragraph 2 starts with 'Following this,' which means it needs something before it. Paragraph 3 starts with 'Meanwhile,' which also needs a previous idea. Paragraph 4 starts with 'Carefully,' which is not an independent idea. Paragraph 5 starts with 'Finally,' which shows it is not the start.

Concluding sentence: Why this is the last line? This paragraph is the last because it starts with 'Finally,' which shows it is the end of the cooking process. It gives the last step to finish the dish. This follows the Conclusive Words rule.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it uses 'Following this,' which shows it comes after the first step. This follows the Connector Strategy.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 with 'Meanwhile,' which shows that while the filling is being prepared, we can also roll out the pastry. This follows the Logical Order.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because after rolling out the pastry, we need to lay it over the dish. This follows the Object Subject Strategy.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 with 'Finally,' which shows it is the last step after preparing the dish. This follows the Chronological Order.