This crust is the most dense

this crust is made of igneous

rocks from volcanoes

1. oceanic crust

this crust is younger

2. continental crust

this crust is made of

metamorphic rocks from

deep within the earth

this crust is thinner

1. oceanic crust

Explanation:

oceanic crust is pushed back into the mantle at subduction zones. As old oceanic crust is subducted and melted into magma, new oceanic crust in the form of igneous rock is formed at mid-ocean ridges and volcanic hotspots.