The main mechanism that can cause loss of fluid in the body would be from sweating and from urinating. Pathological causes that might cause loss of body fluid like diarrhea and bleeding.
Drugs that induce sweating is called diaphoresis. Drugs that induce urine production called diuretic.
If the question is ask for the name of condition where the body loses fluid it can be dehydrated or shock(more severe than dehydrated).
A. energies, tastes, and affect
In a study, the independent variable is the thing that you change to see how the change produces different results. In this study, the independent variable would be the use of nicotine.
HIV or other sexually transmitted diseases.