How does subduction change the ocean floor?

a) subduction cause magma to accumulate on the ocean floor
b) subduction causes oceanic crust to break into pieces
c) subduction causes the ocean floor to sink into deep-ocean trenches
d) subduction causes metamorphic rocks to form

idk help!

I think its c. idk do you have a textbook.

it seems to be C.

To determine the correct answer, let's break down the question and the options provided.

Subduction is a geological process that occurs at plate boundaries, specifically where one tectonic plate is forced beneath another. In the case of oceanic plates, when two plates converge, the denser oceanic plate begins to sink beneath the other plate.

Now let's evaluate each option:

a) Subduction causes magma to accumulate on the ocean floor: This is not a direct result of subduction. Magma can form at subduction zones, but it is typically generated beneath the overriding plate and can lead to volcanic activity on land, not directly on the ocean floor.

b) Subduction causes oceanic crust to break into pieces: While tectonic forces can cause the oceanic crust to fracture and create faults, this is not directly caused by subduction.

c) Subduction causes the ocean floor to sink into deep-ocean trenches: This is the correct answer. Subduction leads to the formation of deep-ocean trenches, which are elongated depressions in the ocean floor. The sinking of the oceanic plate during subduction causes the ocean floor to sink into these trenches.

d) Subduction causes metamorphic rocks to form: Metamorphic rocks can form through various geological processes, but subduction itself is not directly related to their formation.

Therefore, the correct answer is c) subduction causes the ocean floor to sink into deep-ocean trenches.

http://www.answers.com/subduction