Answer the following question given this paragraph: 

Respiration begins with ventilation . This is the process of moving air in and out of the lungs. The lungs are the organs in which gas exchange takes place between blood and air.


Q: In which organs does gas exchange take place between blood and air?

 Choices:

- liver and spleen

- kidneys

- esophagus and larynx

- lungs

A:
lungs
