Question

as labeled in this diagram of the earths interior, where does the material that forms volcanoes originate? a b c d

Explanation:

Volcanic material (magma) forms in the mantle, which is the thick layer between the core and crust. In the diagram:

• A = Inner core
• B = Outer core
• C = Mantle
• D = Crust

Magma that feeds volcanoes originates in the mantle (label C), as partial melting of mantle rock creates the molten material that rises to the surface.

Answer:

C