Science behind volcano

Hi guys today i have come from a new thing which many people requested to know whats the science behind volcanic eruption. So today i am going to discuss about it volcanic eruption is a huge explosion under the surface of the earth. They explode to give out molten lava as well as other volcanic gases as carbon dioxide and sulphur dioxide. So you might think what causes volcanic eruption actually they are caused by the convection current that causes the movement of the tectonic plates. When the tectonic plates are moved they produce the earth to shake and may produce the crack on any of the surface of the earth. As we know that inside the earth there are a hot molten lava flowing so when the tectonic plates move the lava also get shake and due to the high density
And pressure and this is the region that the lava give a huge pressure to the rock plates as a result they are cracked and the lava is come outside through the crater which is the neck region of the volcanic mountain. During volcano a huge black cloud appears which is harmful due to which the people are suggested to move out from that place. Similarly when there is an earthquake there is a huge chance to get volcano. As there the tectonic plates are moved.
        The huge volcanic eruption ever known was the volcano on mount tamboura which is the mountain on island on Indonesia. And it is also said that most of the 80% land of the earth are in the volcanic in its origin. In the world many of the destructions and the lives of the people are gone world world wide due to the volcanic eruptions.