I dont think it is symbiotic, it is parasitic relationship. They get blood supply of human and dont give anything useful to humans
Answer:
The answer should be A
Explanation:
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
100% should be the answer I believe
The food chain would most likely collapse slowing, without a producer other animals cannot get the needed nutrients required to survive.