AS OCR Aristotle's "Final Cause" question

'To what extent does the concept of a final cause tell us anything about the real world?' 10 marks.

Trying to get my head around planning this question. It says 'To what extent' but we've been told that we have to sustain our argument and so can only speak from our opinion, not including the other.
I want to say it does tell us about the real world but I'm confused on what points I should use to support this. I'm thinking that 1) It gives everything in life a purpose, as so to traverse from "Potentiality" to "Actuality", thus achieving change.
2) It supports the idea that the Universe was created for humans, i.e. trees take in Co2 and release Oxygen, liveable habitat for humanity.
Would these points be okay? I don't know about a third point though; I was thinking of including the Prime Mover somehow but I'm confused on how to...
any help would be appreciated :smile: