Question

question 14 of 20 :
select the best answer for the question.

1. which type of volcano is formed from alternating layers of lava and ash?

a. composite volcano
b. hot spot volcano
c. shield volcano
d. fissure
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Explanation:

To solve this, we analyze each option:

• Option A: Composite volcanoes (also called stratovolcanoes) are formed by alternating layers of lava (from explosive eruptions) and ash (from pyroclastic material), matching the description.
• Option B: Hot spot volcanoes are formed by a mantle plume, typically have more fluid lava and build up in a shield - like or other forms, not alternating layers of lava and ash.
• Option C: Shield volcanoes are formed from low - viscosity, runny lava that spreads out, creating broad, gently sloping structures, with little ash layers in the same alternating way as composite volcanoes.
• Option D: A fissure is a crack in the Earth's crust where lava erupts, not a volcano type formed by alternating layers of lava and ash.

Answer:

A. Composite volcano