Hola!! Your answer for this question is oficina de correos.
1.) If you translate the question you get:
I need to buy an envelope in a ____
post Office
Bank
Bakery
Museum
2.) From the options, the best answer will be the Post Office. You can buy an envelope there.
I dont know what your trying to say ?? do you mean Specifically??
Quieres que te lo traduzca a español o qué quieres que haga estoy confundida
