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Choose the best answer. Magma forms at mid-ocean ridges because:

a Volatiles (sea water) is added to hot mantle rocks, lowering their melting temperature.

b Heat is generated by friction along normal faults caused by extension of lithosphere.

c The lithosphere is thinned at divergent boundaries, allowing hot mantle rocks to melt due to decompression.

d The Earth is hotter at divergent boundaries.

Respuesta :

Answer:

The best answer for the given question out of the four options provided is

option C.

Explanation:

Decompression melting also known as adiabatic melting of the mantle is most commonly linked with divergent boundaries of the plate, which serves as the point of the 2 tectonic plates  from one another along a mid ocean ridges leading to  the generation of magma.  

Therefore, thinning of Lithosphere at diverging boundaries , allows hot mantle rocks to melt as a result of decompression.

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