The answer would be the last option which is:
protecting the body
excreting wastes
regulating temperatures
generating vitamins
This includes the skin and its extremities acting to shield the body from different sorts of harm, for example, loss of water or scraped area from outside. The framework has numerous parts in homeostasis. All body frameworks work in an interconnected way to keep up the inside conditions fundamental to the capacity of the body, the skin has a vital activity of securing the body and goes about as the body's first line of protection against contamination, temperature change, and different difficulties to homeostasis.
1996 I think but yerr check
Its usually about 80 pounds but can also range from 60-120
Factors That Affect BAC
-Body size
-Biological sex
-Physical condition
-Medications you take
-What you've eaten (and when)
-How much sleep you've had
-Alcohol content of your drinks
