The answer is b: muscular & excretory system
hope this helps :)
Anorexia is an eating disorder where the individual does not eat at all due to the perception of being "Fat". HIV is the virus that causes AIDS. Bulimia is an eating disorder characterized by regurgitation, especially after eating binges.
Answer:
It is the stuff that you breath
Explanation:
Because if you didn't, you would die... So the benefit of oxygen is not being dead.
