The answer is c because if you treat the sewage water than you that means that the water will be clean so it prevents diseases
Lines up in the middle of the cell
Scientists have concluded that the average human body contains approx. 37.2 trillion cells. However it depends upon your size compared an average human being. :)<span />
Nitrogen and hydrogen
N2 +3 H2 ---> 2NH3
hope that answers the question:)