The crust below the oceans is
made of sand and salt sediment
mostly granite
made of metamorphic rock and granite
basalt and a layer of salt sediment

Explanation:

The crust below the oceans is thinner than the crust below that continents.

This crust is called oceanic crust. It is predominantly made up of mafic magma which produces basalt and other mafic rocks when they cool and solidify.

The oceanic crust is generally thinner than the continental crust below the continent.

The oceanic crust is about 5-10km thick.

Continental crust is about 30km thick.

In terms of density, the oceanic crust is denser than the continental crust.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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