I think tomorrow I ' m going to stay in and relax and do some studying and stuff ... if I get bored I might go to Ueno . Apparently Ueno has a zoo , a museum and a park . I think I might go to the park tomorrow and then go to the zoo and the museum later this week . Yuko says the museum has little ear phones you can use to hear English translations of the tour .
According to the above context, answer the following question.
Why does the narrator need ear phones at the zoo ?


The zoo is in a foreign country .