A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of successful businesses and their important qualities. It sets the stage for the discussion without needing any prior context. It uses a broad overview to explain what makes a business successful. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "None, however," which is a conjunction. Paragraph 3 uses specific terms and does not introduce the topic. Paragraph 4 mentions specific people and their actions, needing context from earlier sentences. Paragraph 5 refers back to the previous ideas, making it dependent.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion by summarizing the importance of the ability to sense the market. It shows the result of not having this ability, which brings closure to the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it uses the word "None" to refer back to the senses mentioned in Paragraph 1. This shows a logical order where the second paragraph specifies that sensing the market is the most important sense.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 follows Paragraph 2 logically because it explains what the ability to sense the market means. It provides details about the skills needed for a senior executive, which supports the claim made in Paragraph 2.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it gives examples of successful people who used the skills mentioned in Paragraph 3. This shows a logical order where the specific examples follow the general statement.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 follows Paragraph 4 because it explains the consequence of not having the ability to sense the market. It shows a cause and effect relationship, where the lack of this ability could lead to failure.