What is the appositive phrase in The customers people from all walks of life buy various merchandise at the discount store?

In the sentence "The customers, people from all walks of life, buy various merchandise at the discount store," the appositive phrase is "people from all walks of life." This phrase provides additional information about "the customers" and helps clarify who they are. Appositives typically rename or elaborate on a noun, and in this case, it specifies the diversity of the customers.