Final answer:
Benji's action of calling all men 'dad' is an example of assimilation, a cognitive process identified by Piaget where new information is integrated into existing schemas without altering them.
Step-by-step explanation:
When Benji starts calling his father “dad” and subsequently applies the same label to all men he sees, he is demonstrating what Jean Piaget referred to as assimilation. This is a cognitive process where Benji is incorporating new information into an existing cognitive schema without changing the schema. Essentially, he has learned the concept of “dad” and now assimilates any man into this same category. Over time, through experiences and corrections, he will begin to differentiate and appropriately categorize different men, a process known as accommodation, which complements assimilation in Piaget's theory of cognitive development.