The ethical "no free lunch" rule states that: if an action cannot be taken repeatedly, then it is not right to be taken at any time. one can put values in rank order and understand the consequences of various courses of action. anything of value should not be taken. everything is owned by someone else, and that the creator wants compensation for this work. one should take the action that produces the least harm or incurs the least cost.

anything of value should not be taken. everything is owned by someone else, and that the creator wants compensation for this work.  

Explanation:

The ethical rule "no free lunch" refers to the fact that nothing is free and everything has its price. This rule states that anything you earn will be charged a value, nothing will be given to you for free, and the value of those things will not always be charged in cash. In addition, the rule states that you should not wish or take any object from anyone without paying the proper amount. In other words, we can state that the "no free lunch" rule states that if something someone else has created is useful to you, it has value and you must assume that the creator wants compensation for that work

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

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