Every living quarter has one to let the light in

Bunlar nedir?

Şu nedir?

Burası neresi?

You would go there to send letters

Bu nedir?

Bu nedir?

Resimde kim yok? (Who is not in the picture?)

a book or electronic resource that lists the words of a language (typically in alphabetical order) and gives their meaning, or gives the equivalent words in a different language, often also providing information about pronunciation, origin, and usage.

Which one can fly?