Germs is probably the answer
The answer is C. A drug is any substance that alters the normal functioning of the body.
A drug is any substance other than the nutrients essential for body changes the normal functioning of the body. It may be physiological or biological which is temporary. A drug is used in the diagnosis, treatment or prevention of a disease to relief the discomfort. A drug producing a state to relief the discomfort. A drug producing a state of casual when used in continuation or in excessively causes addiction known as drug abuse.
C) Red Blood Cells
Red blood cells contains hemoglobin, which provide oxygen
A. Depressants because its used to treat depression and other pschylogical problems.
Primarily means for the most part, so it means This type of physical fitness is mostly influenced by an individual's exercise habits.