Which type of volcano is formed from alternating layers of lava and ash?

The correct answer is C) Composite volcano.

Composite volcanoes, also known as stratovolcanoes, are formed from alternating layers of lava flow, volcanic ash, and other volcanic debris. This combination leads to their characteristic steep profile. These volcanoes often produce more explosive eruptions due to the viscosity of the lava, which can trap gas and create pressure. If you have more questions, feel free to ask!