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 text. It sets up the theme of preparing a meal by explaining the initial step of deciding on a menu. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs do not qualify as the first sentence. For example, Paragraph 2 starts with "After the menu was set," which means it needs the previous context. Paragraph 3 starts with "Once home," which also needs prior information. Paragraph 4 starts with "Finally," which shows it is not the beginning. All these sentences are dependent on earlier context.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the whole process of preparing and enjoying the meal. It uses conclusive words like "Finally" to show it is the end of the story.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it follows a logical order. After deciding on the menu, the next step is to shop for ingredients. This shows a clear progression of ideas.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it continues the process of meal preparation. After shopping for ingredients, the next step is to prepare the meal. This shows a logical order of actions.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it describes what happens after the meal is prepared. Gathering everyone around the table is the next step after cooking. This shows a clear progression from preparation to sharing the meal.