I think its because when your upside down, your not breathing right. So its a way of trying to breathe correctly.
The answer is the first one: “...attract each other.”
As far as I know of B would be the correct answer but i am not positive
Good luck!!
Answer:
SIV or Simian immunodeficiency virus
Explanation:
It causes a disease in monkeys similar to AIDS and is closely related to HIV-2 of humans.
