Question

Which process helps gas exchange to occur?

a transfusion
b condensation
c evaporation
d diffusion

Answer 1

The answer is a because I think so

Answer 2

D. Diffusion

Step-by-step explanation:

"...oxygen diffuses from alveolar sacs to blood in capillaries CPR, or cardiopulmonary resuscitation, is a first-aid technique to help save lives."