I can better help you if you list the options
they are referring to the opposition of "tabula rasa", its the idea people are born without built in mental content, we develop it over time. as well as we dont have personalities or ideas when we are born, but the the molded by our experiences <span />
Answer:
Verb voice has to do with when the action of a verb takes place. I think x)
A. their
Their refers to the the multiple (both means more than one) squirrels themselves
If it was HIS then it would refer to only one squirrel
If it was OUR it would mean you and me (We) had our acorns hidden