“slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere, causing
earthquakes.
rift valleys.
ocean trenches.
mid-ocean ridges.

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere, causing earthquakes. Slab pulls are actually portions of the motions of a tectonic plate that accounts for its subduction. The motion of these plates are driven by weight of cold and denser plates that sink at trenches towards the mantle of the Earth. 

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.