A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main idea about the challenges students face. It does not refer to any previous information and sets the stage for the topic of working while studying. This follows the rule of Topic Sentence. Why other lines are not chosen? Paragraph 2 starts with 'Working as a student...' which makes it dependent on the first idea. Paragraph 3 starts with 'However...' which is a conjunction and needs a previous sentence for context. Paragraph 4 starts with 'Online tutoring...' which is specific and does not introduce the topic. Paragraph 5 starts with 'As an online tutor...' which also assumes prior knowledge.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it provides a conclusion about online tutoring. It explains how students can find work as tutors, wrapping up the discussion. This follows the Conclusive Words rule.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): The second paragraph connects to the first because it continues the idea of the difficulties students face. This follows the Logical Order rule.
• Pair 2 (Paragraph 2 → Paragraph 3): The third paragraph connects to the second by showing a contrast. It explains that despite the difficulties, getting a job has benefits. This follows the Contrast rule.
• Pair 3 (Paragraph 3 → Paragraph 4): The fourth paragraph connects to the third by providing a specific example of a job that students can do. This follows the Broader to Specific Strategy.
• Pair 4 (Paragraph 4 → Paragraph 5): The fifth paragraph connects to the fourth by explaining how online tutoring works. This follows the Logical Order rule.