Which layer of the Earth is composed of rigid pieces that are always moving?

A. Mantle
B. Inner core
C. Outer core
D. Crust



Answer :

Final answer:

The mantle, a layer of the Earth, consists of molten rock that moves due to convection currents, impacting plate tectonics and geological events like earthquakes.


Explanation:

The layer of the Earth composed of rigid pieces that are always moving is the mantle.


The mantle is located between the core and the crust, consisting of molten rock that moves continuously due to convection currents. It is less dense than the core and can behave in a plastic manner, allowing it to flow slowly.


Convection currents in the mantle are responsible for plate tectonics, influencing the movement of the Earth's lithosphere and leading to phenomena like earthquakes and volcanic eruptions.


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