At about 41 minutes, when the Nox city first appears, a suspending cable can be seen running horizontally across the screen.
After Nafrayu is killed by Apophis and his father is carrying his body, which should be dead, Nafrayu's head is upright; if he were dead, his head would be limp. And it's not being held up; in fact, it is even jostled and he keeps it up. But if he isn't dead, then they would not need to use their powers to bring him to life.