A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of the studies by Elly A. Konijn. It does not refer to any previous information and sets the stage for the discussion about actors and their awareness during performance. This follows the rule of Topic Sentence. Why other lines are not chosen? Paragraph 2 starts with "She asked" which uses a pronoun and does not stand alone. Paragraph 3 starts with "She found" which also uses a pronoun. Paragraph 4 starts with "However" which is a conjunction and shows a continuation of thought. All these reasons make them not independent.

Concluding sentence: Why this is the last line? This paragraph is the last line because it concludes the discussion about the emotions of actors. It summarizes the findings about negative emotions, which wraps up the main topic of the study.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the discussion about the studies. The phrase "She asked Dutch actors" shows a logical order from the introduction of the studies to the specific actions taken in those studies.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it provides the results of what the actors rated. The phrase "She found that positive emotions" shows a logical order from the actions of the actors to the findings of the study.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it contrasts the findings about positive emotions with the findings about negative emotions. The word "However" shows a contrast between the two ideas.