A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first because it introduces the main topic of the text. It talks about the difference between competence and performance in language learning. This is a broad overview of the subject. It does not use any pronouns or definite articles that need prior context. Why other lines are not chosen? Paragraph 2 starts with "Separate from actual performance" which makes it dependent on prior information. Paragraph 3 starts with "In actual driving" which also needs context. Paragraph 4 starts with "An analogy can be made" which is not a general statement. Paragraph 5 starts with "Knowing the Highway Code" which is specific and does not introduce the main topic.

Concluding sentence: Why this is the last line? This paragraph is the last because it summarizes the main idea of the text. It clearly states the difference between knowing something and doing it, which reflects the overall theme of competence versus performance.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): This pair connects because the second paragraph explains how competence is used in performance. It follows logically from the first paragraph, which defines competence.
• Pair 2 (Paragraph 2 → Paragraph 3): This pair connects because the third paragraph gives an analogy to help understand the concept of performance. It shows how knowing the Code is similar to knowing language rules.
• Pair 3 (Paragraph 3 → Paragraph 4): This pair connects because the fourth paragraph explains what happens in real driving. It shows how drivers must adapt the Code to different situations, just like language users must adapt their knowledge.
• Pair 4 (Paragraph 4 → Paragraph 5): This pair connects because the fifth paragraph concludes the analogy by stating that knowing the Code is different from actually driving. It wraps up the discussion about competence and performance.