Where is the youngest rock in the earth’s crust found?
a) near the boundary between ocean crust and continental crust
b) along the continental slope
c) in the center of the continents
d) at the center of the mid-ocean ridge

The youngest rocks are easy to find and can  be search on  the nearest volcano.Mid-ocean ridge is where new crust forms from outpouring magma.
therefore,
the right answer is D) at the center of the mid-ocean ridge

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.