The huge hole left by the collapse of a volcanic mountain is called aa. lava plateau.
b. caldera.
c. cinder cone.
d. shield volcano.

The huge hole left by the collapse of a volcanic mountain is called a  caldera. Correct answer: B

It is a massive crater located at the sites of enormous volcanic eruptions after large amounts of magma have been expelled from underground.  Some calderas are surrounded by steep cliffs, and some are filled with water and form lakes.

The huge hole left by the collapse of a volcanic mountain is called a caldera(B)

Further Explanations:

Volcanoes are the opening in the on the surface of the Earth from where lava, tephra, and steam from inside the earth erupts to the surface of the earth. The volcanic terrains get formed by the slow eruption of lava. Most of the eruption occurs due to the movement of the tectonic plates that creates pressure inside the earth and forces the lava top to erupt to the surface of the earth.

The formation of the volcanic mountains is also the result of the volcanic eruption and is considered to be the youngest mountains of all the mountains. The lava that forms the volcanic mountain is the lava that is present deep inside the earth, even below the ballistic lava.

The collapse of the volcanic mountains forms a deep hole in that area that is also called Caldera. The major reason behind the collapse of the mountain is the emptying of the magma chamber below the mountain due to over-discharge of magma from that region.

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Answer Details

Grade: High School

Subject: Geography

Chapter: Volcanoes`

Keywords:Volcanoes, lava, tephra, steam, volcanic terrains, tectonic plates, volcanic mountains, volcanic eruption, ballistic lava, Caldera, magma chamber