Answer:
I think its A
Explanation:
Because the reason why airplane have closed windows is because we can't breathe in carbon dioxide when we go up. Of course there is oxygen just not a lot as we go up. Why would there be helium in the air? We would sound weird when we skydive.
A key role is that u can have ur family therapists to talk to for free
Answer:
Plasma and Platelets
Explanation:
These are the two main components that make up blood.
<h3 /><h3>hope this helps</h3>
Nucleus
The DNA is located in the nucleus which are chromosomes
