Answer:
homeostasis, or a stable internal environment.
Explanation:
I think that this is the answer, but I'm not entirely sure.
the branch of science concerned with the bodily structure of humans, animals, and other living organisms, especially as revealed by dissection and the separation of parts. hope this helps :)
Its 18 electron
1st orbital : maximum = 2 electrons
2nd orbital : maximum = 8 electrons
3rd orbital : maximum = 8 electrons
2+8+8 = 18 electrons
C: Photosphere ,corona ,chromosphere.
People will have a harder time exchanging goods and services and many businesses will shut down as a result.