Ok, so I am not 100% sure, but I would say it would be a positive feedback loop because by drinking water you are putting fluids back into your body, which is good for you. Getting dehydrated would be an example of a negative feedback loop, because being dehydrated is obviously not a good thing.
Quite possibly. See, if a parent died when a child is young, then that automactically goes straight to neglecting to nurture, which may lead to depression, and, in late teens, or early adult life, death. I hope you found this answer helpful! (:
