Question

mantle is the centre of earthquake and volcanic eruptions give geographical reason

Answer 1

mantle is the centre of earthquakes and volcanic activity because they only occur due to changes in pressure and position of tectonic plates which are a part of the mantle and are connected with the crust of the earth...

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Answer 2

The rocks in the upper 100 to 200 km of the Mantle melt due to the heat and the Magma is created. Magma chamber are found in this layer of the Earth. Due to the heat and pressure, the energy waves are created in mantle. These energy wave move in vertical direction and Magma comes out on the surface of the Earth by volcanic eruptions.