A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It talks about how companies deal with cleanup demands. This is a broad overview of the subject. It does not use any specific details or references to previous information. Why other lines are not choosen? Paragraph 2 starts with "Especially if the company is small," which makes it dependent on prior context. Paragraph 3 starts with "If the company is so large," which also needs context. Paragraph 4 starts with "In either case," which refers back to previous ideas. All these sentences do not stand alone.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it summarizes the outcomes of the previous actions discussed. It wraps up the main ideas and shows the consequences of the companies' decisions.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it gives a specific example of one way companies respond to cleanup demands. This follows the Broader to Specific Strategy.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it presents the other way companies respond to cleanup demands. This shows the Logical Order of ideas.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it explains the consequences of the actions of the companies. This follows the Cause and Effect Relationship.