Question

Q. Consider the following statements regarding the causes of volcanic activities:

Which of the above statements is/are correct?

• A.
  1 only
• B.
  1 and 2 only
• C.
  2 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is D

1, 2 and 3
Explanation:

Volcanoes are formed by eruptions of lava and ash when magma rises through cracks or weak spots in the Earth's crust. A build-up of pressure in the earth is released, by things such as a plate movement which forces molten rock to exploded into the air causing a volcanic eruption. The lava from the eruption then cools to form a new crust. Over time, generally several eruptions, the rock builds up and forms a volcano.