Question

Respiration is necessary for:

A. moving blood through the body.
B. sustaining life and body functions.
C. binding hemoglobin and red blood cells.
D. increasing oxygen requirements.

Answer 1

D:

Step-by-step explanation:

Respiration is needed for oxygen and to breathe and is made of lungs etc. Blood moving is not respiration, sustaining life and body functions isn't respiration, hemoglobin and red blood cells aren't about respiration.