Question

At the lake the boy holds his breath while swimming under water. After a few seconds, his lungs start to burn and he has the urge surface and gasp for air. Which statement below best explains why this happens?
Select one:
a. His body has too much oxygen and needs to get rid of it.
b. His body is thirsty and needs moisture from the air.
c. His body produces carbon dioxide and needs to exchange it for oxygen
d. His body is hot and needs to pant to cool down.

Answer 1

Hey there!
When you breathe in, your body is inhaling oxygen and converting it into carbon dioxide, or CO2. When you exhale, your body is getting rid of that CO2- because usually, it's not good to inhale.
Therefore, the answer is C. Your body has CO2 in it, and needs to get oxygen to oxygenate the blood to give to places like the brain that need it most. 
Hope this helps!

Answer 2

C the correct answer is c because our body produces carbon dioxide and brings in oxygen