The main thing to try and do is relieve your mind of the stress, in whatever way you find most suitable. If you are under a lot of stress from your social life, just take a break and do what you like. If you are under a lot of stress from education/studies, again take a break, however making sure you don't fall behind, as this will stress you out more.
For some people, taking a break might be watching YouTube, others having a leisurely walk.
I believe the answer to your question will be hard water because it has more minerals and that would make it the preferred water to drink.
I believe that we get moslty fiber from fruits and vegatables.
The answer would be : norms.
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Hope this helps !
Photon</span>
A species is a group of animals while an organism is a singular animal, plant, or cell (to sum up, a species is a group and an organism is singular)