Answer:
Excerpt 1 is part of the conclusion of a speech.
Except 2 is part of the introduction of a speech.
Except 3 is part of the introduction of a speech.
Explanation:
Except 1 is part of the conclusion because it is talking about what the audience should do after they have heard about planting trees and the actual problem. In other words, it is talking about what we should do for a better future.
Except 2 is part of the introduction because it is someone who is introducing herself to the audience before starting her speech.
Except 3 is part of the introduction too, since the speaker decided to start talking about planting trees with a poem that is related to the topic.
A car mechanic who is tuning the engine in the car for the first time.
