Answer:
skin is the fastest growing organ in human beings.
Answer is: <span>C-an ether.
</span>Ethers are an organic compounds that contain an oxygen atom<span> connected to two </span>alkyl<span> or </span>aryl groups, the general structure of an ether is R-O-R' (<span>R and R' are any </span>alkyl<span> or </span>aryl substituent).
In this example <span>black railroad cars are carbon atoms and one red railroad car is oxygen atom.</span>
A. MnS(s) + 2H + (aq) > Mn2 + (aq) + H2S(g)