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 text. It sets up the focus on identifying topics for the community. This follows the rule of Topic Sentence, as it gives a broad overview without going into specifics. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'Following the topic selection,' which needs prior context. Paragraph 3 starts with 'We then promoted,' which also needs earlier information. Paragraph 4 starts with 'Ensuring the workshop included,' which is not independent. Paragraph 5 starts with 'Reflecting on the event's success,' which assumes knowledge of the event.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it summarizes the main points of the text. It reflects on the success of the event and ties together the earlier points about planning and execution. This follows the rule of Summary Style, as it brings together the key ideas discussed.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the thought about the topic selection. It uses the Connector strategy, as 'Following the topic selection' shows a logical order of steps in planning.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it shows the next step after securing speakers. It uses the Logical Order strategy, as it follows the sequence of planning the event.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it describes what happened during the event. It uses the Object Subject Strategy, as the promotion leads to the need for interactive sessions.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it reflects on the overall success of the event. It uses the Cause and Effect Relationship strategy, as the interactive sessions contributed to the event's success.