Answer:
Everyone is excited for the pep rally. Katie and Jill are in charge of blowing up the balloons, their least favorite task.
They hate how the balloons have to be completely full or it won't float. On the other side of the gym, Sam is practicing the cheer routine. If she doesn't practice, she could embarrass herself.
The last to arrive are Brynn and Avery with the shirts to give away. As long as everyone does their part, the pep rally will be a success.
Step-by-step explanation:
Pronoun agreement refers to the agreement between the pronoun and the antecedent in terms of number and gender. With the singular antecedent, a singular pronoun is used. With the plural antecedent, a plural pronoun is used.
In the first paragraph, the antecedent is 'Katie and Jill' which is plural. Hence, the pronoun 'their' will be used here.
In the second paragraph, the antecedent is 'Sam' which is feminine gender. Hence, the pronoun 'she' will be used here.
In the third paragraph, the antecedent is 'everyone' which is plural. Hence, the pronoun 'their' will be used here.