Question

the chief cause of a volcano is disturbance in earth's crust . elaborate the statement ​

Answer 1

Answer:

Volcanoes are formed by eruptions of lava and ash when magma rises through cracks or weak-spots in the Earth's crust. A build up of pressure in the earth is released, by things such as a plate movement which forces molten rock to exploded into the air causing a volcanic eruption.

During earthquakes, faults, or giant cracks, are produced by the pressure of the moving rock. Earthquakes and volcanoes occur along the edges of the plates.When plates move apart, they produce new ocean floor as magma from the mantle rises up through volcanoes and deposits new rock along the plate boundaries.