Answer:
The nine people chosen to march in the sportsmanship parade
Explanation:
Hi, a sample is a smaller and representative set of individuals from a larger population.
The Sample is usually of a manageable size (in this case 9 people)
In this case, the sample is representative because we don't know the exact number of all the people that attended the football game.
In conclusion, the sample in this situation is the nine people chosen to march in the sportsmanship parade.
Feel free to ask for more if needed or if you did not understand something.