The answer is a. Nitrogen
Answer:
Lol! Also, what is the question? Or is there no question?
Explanation:
are the leading causes of death worldwide
Answer:
C. Allow the individual to survive better and reproduce more in the environment
Answer:
False
Explanation:
A virus (which is a pathogen) has a lot of antigens on its surface, so they can't be used interchangeably.
