Its obviously wrong. And the right desicion is to say no, and try to explain that it is wrong for them to even have it. But its your own desion, just try to make the right one.
Answer: Integumentary.
Explanation:
The integumentary system is the system that protects the body from damage such as loss of water or abrasion from outside. For example, nails, hair, skin, etc.
You should drink 8-8 oz water a day. (about 2 liters or about half a gallon)