A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of creating a personal budget. It does not refer to any previous information and sets the stage for the discussion. It uses a broad overview of the topic without going into specifics. Why other lines are not chosen? Paragraph 2 starts with "It became apparent" which makes it dependent on prior context. Paragraph 3 starts with "This led to the realisation" which also needs previous information. Paragraph 4 starts with "The final piece of the puzzle" which suggests it is concluding a thought. All these sentences do not stand alone.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about budgeting. It shows the final action needed after all previous steps. It gives a sense of completion to the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): The second paragraph connects to the first because it continues the topic of budgeting. The first paragraph talks about starting a budget, and the second explains a key step in that process, which is tracking expenses. This shows a logical order.
• Pair 2 (Paragraph 2 → Paragraph 3): The third paragraph follows logically from the second. After tracking expenses, the next step is to categorise them and set goals. This shows a clear progression from one idea to the next.
• Pair 3 (Paragraph 3 → Paragraph 4): The fourth paragraph connects to the third because it discusses the final step after categorising expenses and setting goals. Adjusting spending habits is the next logical action, showing a clear flow of ideas.