You are presented with the question "What may become unbalanced if the rate of breathing is too fast or too slow?" and the following answer choices: 
- meiosis
 - rain levels
 - photosynthesis
 - blood acidity
 - an organism's body
 - Veins and arteries.
 - kinetic energy
 - swamp vegetation

Now knowing that blood pH may become unbalanced if the rate of breathing is too fast or too slow and acidity is measured with a pH meter or with pH paper strips, choose the best answer.


 

    blood acidity     