Final answer:
Positive peer pressure describes the situation when Zachary's friends are insisting he buys the same expensive brand of shoes.
Step-by-step explanation:
The best description for this situation is positive peer pressure. Positive peer pressure occurs when friends influence each other in a positive way to make choices or take actions that are beneficial. In this case, Zachary's friends are encouraging him to buy the same expensive brand of shoes they are wearing.
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