This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Volcano made when plates  breaks through its surface. it formed by accumulation of magma or molten rock below earth's surface. ones magma form it form to rise .
and it takes a million of years in order to process, after it forms in earth's surface
 the materials erupted add another layer to the growing volcano.