Answer:
The answer is most likely enzymes that clot blood
Answer: age, smoking habits, and size/weight
Explanation:
The older you get, the weaker you'll be, so your breathing will be effected.
If you smoke then your lungs will be effected which will ultimately have an affect your breathing.
If you're really heavy (ex. Over weight) then you will get tired more easily, which will effect your breathing rate.
You can test the hypothesis by experimenting.
In this step, you can find out if your hypothesis is true, and draw a conclusion through the outcomes.
hope this helps
i think its b ? am aint sure
