Multiple choice

A volcano is a vent or an opening in the earth's crust through which ______________ come out.

  1. molten lava, dust and steam and even pieces of rocks

  2. molten lava and clouds of gases

  3. clouds of gases

  4. all of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Volcanoes release various materials during eruptions, including molten lava, gases, steam, dust, and rock fragments. Different eruptions may produce different combinations of these materials, so 'all of the above' is the most comprehensive answer.

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