Question

________ refer to an opening in the earth's crust from which motion lava ,rock fragment ashes , dust and gasses are ejected from below the earth surface ​

Answer 1

Volcano is the required answer.

Hope it helps you ✌

Answer 2

Answer:

Volcano

Explanation:

Volcano is an opening to the earth 's crust and it happens due to sudden earthquakes. There are 6 types of Volcanoes-

composite volcanoes, shield volcanoes, Cinder Cone Volcano, Strat volcano,  Rhyolite caldera complexes,  Monogenetic fields, Flood Basalts