A. cell division or <span>b. cell fractionation
</span>
Answer:
A.
Explanation:
Because the other ones do not make sense.
Answer:
After the wastewater is purified it is pumped into the ground to mix with aquifer water. Sometimes the treated water is used to form a barrier against invading seawater on groundwater. The purified water trickles down to replenish the groundwater supply.
Explanation:\
I hope that helps. I don't know if this is right or wrong, but good luck :)