[I] takes out a rubik's cube and places it on the roof then runs his fingers over it..
[II] is screwing the roof into place..
[III] is talking while the ending title screen..
[IV] is showing the finished roof, as a man holds a folding lawn mower with several flowers..Choose from options above and answer: What most naturally follows?

We see the roof up close and see moss growing on it. We see the insulation and the roof as it is being installed. a man
Answer:
[II]