The first one. Una Ventana. It’s grammatically correct
Answer 2
it has to be Una ventana!
Related Questions
How would you best rewrite the sentence?
Él dio una galleta a nosotros.
El dio una galleta a nos.
Él nos dio una galleta.
TU nos diste una galleta
Nosotros le dimos una
galleta
Answers
He gave us a cookie. He gave a cookie. You gave us a cookie we gave him a cookie (hope this helps and if it an option I’d say the first one)