Question

where is oceanic crust thickest?
a. at mid - ocean ridges
b. in the center of ocean plains
c. at deep - sea trenches
d. none of the above
please select the best answer from the choices provided

Explanation:

Oceanic crust is formed at mid - ocean ridges through volcanic activity. As it moves away from the ridges, it cools and becomes denser. However, it does not thicken at mid - ocean ridges (a). Ocean plains (b) have relatively thin oceanic crust. Deep - sea trenches (c) are areas where oceanic crust is being subducted (forced beneath another tectonic plate), so the crust is not thickest there.

Answer:

D. none of the above