I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
The answer is A stress can lead to increased vulnerability to infections and immune deficiency disorders
Answer:
Birth control contains either estrogen and progestin or progestin only. Hormone methods include the implant, IUD, pills, the ring and the skin patch. I’m pretty sure they all have an effect but I believe mostly the birth control patch! Hope this helps!
Explanation:
Answer:
B
Explanation:
You do not need to know what bone density is when you are relating it to fitness because it has no relevance.
