Which statement explains what happens as magma rises inside a volcano? a. gases contract. b. gases disappear. c. pressure decreases. d. magma moves to other chambers. the answer is not d

Volcanoes happen when magma rises to the surface of the earth, which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain, and it eventually explodes. When the magma bursts out of the earth, it is called lava.

so i would say your answer is c

The magma when rises inside of a volcano, the pressure inside gets decreased.  

Option C

Explanation:  

Magma is burning hot liquid which is lighter in density than the underneath materials which are solid in nature. Magma is basically a molten lava. The rising of the magma, tends to decrease in the pressure inside the volcano.

As the pressure decreases, gas are seen to expand freely in less pressure. Therefore, gases do not contract but expands, and thereby they do not disappear. So, the correct option is C.

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