Answer: Adjective.
Explanation:
"Complex" is used here to describe the group of apartments. So, it qualifies for describing a noun, like the definition of adjective. Let me know if you got it right.
Answer: Think about the question from your own life - which of these types of non-fiction resources do YOU use most often? Why is it useful to you? What makes you choose to use that type instead of one of the others?
Explanation: Answering those questions should give you your response, and then you'll just need to edit your grammar, spelling, capitalization, and punctuation.
I can’t see the paragraph