Question

where do volcanic eruptions generally occur give one reason

Answer 1

Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes, like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots.

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Answer 2

when the pressure of the molten rock inside the earth increases, it travels through the low pressure area(atmosphere) and causes valconic eruption.