Final answer:
The idiom 'Monkey see, monkey do' refers to the mimicry behavior of primates. It is based on the observational learning and imitation abilities facilitated by mirror neurons.
Step-by-step explanation:
The idiom that implies a primate copies what it views is a) Monkey see, monkey do. This phrase is used to describe a situation where someone mimics another's actions without understanding the consequences or the reasons behind those actions. It highlights the tendency to imitate others, a behavior observed in many species, including primates. Research on mirror neurons suggests that this ability to mimic may have played a role in the development of languages, as it allowed early humans to understand and replicate each other's actions.