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 article. It talks about Digital Rights Management (DRM) and its importance. This is a broad overview of what the article will discuss. It does not use any pronouns or definite articles that need prior context. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "The aim of this article..." which refers back to the article and is not independent. Paragraph 3 starts with "In contrast..." which shows a comparison and needs context. Paragraph 4 uses "the" which assumes prior knowledge. Paragraph 5 starts with "The article concludes..." which also refers back to the article.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the article. It uses the word "concludes" which signals the end of the discussion. It summarizes the points made and gives recommendations, which is typical for a concluding paragraph.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it explains the aim of the article after introducing DRM. This follows the Broader to Specific Strategy, where the first paragraph gives a general idea and the second paragraph specifies the aim.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it follows the aim with details about DRM. This is a Logical Order where the second paragraph sets up the discussion that the third paragraph elaborates on.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it contrasts the benefits for firms with the lack of benefits for consumers. This follows the Contrast rule, showing a clear difference in perspectives.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 because it wraps up the discussion by providing recommendations. This follows the Logical Order, where the conclusion comes after discussing the issues.