Question

The ocean floor is at a lower elevation than the continents. Which of the following pieces of evidence best supports this claim? Tectonic plates located below the continental crust do not move. Gravitational force is stronger beneath the continental crust. Oceanic crust is thinner and denser than continental crust. Continental crust and oceanic crust are stacked in alternating layers.

Answer 1

Ocean floor is at  a lower level because oceanic crust is thinner and denser than continental crust.
Therefore,the answer is option C

Answer 2

Answer: Oceanic crust is thinner and denser than continental crusts.

In the convergent plate tectonics, the two plates collide with each other.The denser and heavier plate gets sink beneath the lighter plate.  When one plate bend and slides underneath the other, the plate gets heated with the hot magma. This is known as subduction.

Oceanic crust is denser than the continental crust. On subduction, the oceanic plate usually sinks underneath the mantle and it forms a sunduction zone.