Out of the passage the summarizing sentence is
Tommy knows that in a formal discussion, you must be acknowledged before speaking
Explanation:
The sentence talks about the formal manners that Tommy must be following as he is now elected into the students' council for the school which is an administrative position among the students.
He must follow the rules of a fruitful discussion so as to be acknowledged as a viable part of the group and have his voice heard among his peers in the council that he is elected to.
The passage goes into the descriptions of such manners that it is necessary to learn.
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I think the answer is shoveling people’s driveways.
