A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of starting an herb garden. It does not refer to any previous information and gives a broad overview of the subject. This follows the rule of Topic Sentence. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'Choosing', which is not independent. Paragraph 3 starts with 'Next', which shows it is not the first. Paragraph 4 starts with 'Regular', which also shows it is not independent.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the topic of maintaining an herb garden. It summarizes the key points about care and shows the importance of regular watering and trimming.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the idea of starting an herb garden. It uses the Logical Order rule, as it explains an important step after introducing the project.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it follows the idea of preparing the garden. It uses the Broader to Specific Strategy, as it gives more details about what to do after choosing a sunny spot.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it talks about care for the herbs after selecting them. It uses the Logical Order rule, as it explains what to do next to keep the garden healthy.