The process of acquiring oxygen from outside the body and to use it in the process of breakdown of food sources for cellular needs is commonly called______.

The process of acquiring oxygen from outside the body and to use it in

1.	The process of acquiring oxygen from outside the body and to use it in the process of breakdown of food sources for cellular needs is commonly called______.
A.	respiration
B.	nutrition
C.	digestion
D.	transportation
Answer» B. nutrition