Question

breathing is an example of a) ventilation b) diffusion c) counter current exchange d) None ​

Answer 1

Answer:

a) ventilation

Explanation:

because ventilation means exchange of gases and that's what breathing actually is

Answer 2

Answer:

If we understand the sense of question we can easily reached to answer

I mean the word ventilation is the synonym of breathing

but in the given question he has asked about the example of breathing which is DIFFUSION as exchange of gases take place due the difference in partial pressure of oxygen and carbon dioxide

I hope you've understood it