The first one.........................
It will be easier to answer if you show the choices.
Answer:
Explanation
There is a direct proportional relationship between mass and volume of water. As volume of water increases, the mass of water increases as well.
OK, its deff not the last one b/c all that trash just goes into the air, overwater farm land would kill crops (no help there), Ive never heard of heating water to kill excess bacteria. There is ,however, a new technique called Bioremediation which is the use of living organism to clean up a medium i.e. air,soil, water. It would seem the 2nd answer is correct.
