Why does oceanic crust subduct under continental crust?

Question

subduction zone with resulting volcano | Subduction zone, Subduction, Earth and space science

a
Oceanic crust is denser than continental crust and therefore sinks with gravity
b
Oceanic crust is made of magnetic metals and are being attracted to the Core of the Earth.
c
Continental crust are more porous, which allows it to absorb the water in the oceanic crust
d
Oceanic crust moves slower than continental crust, so Continental crust overtakes it.

Answer 1

The correct answer is:

a: Oceanic crust is denser than continental crust and therefore sinks with gravity.

Oceanic crust is primarily composed of basalt, which is denser than the granitic composition of continental crust. When these two types of crust converge, the denser oceanic crust is forced down into the mantle in a process known as subduction. This process can lead to the formation of subduction zones, deep ocean trenches, and volcanic activity as the oceanic plate melts and generates magma.