What type of eruption is associated with composite volcanoes?

Composite volcanoes, also known as stratovolcanoes, are characterized by their layered structure, which results from alternating eruptions of viscous lava and explosive materials such as ash, tephra, and volcanic rock. This type of volcano typically has steep sides due to the thicker lava that does not flow as readily as the lava from shield volcanoes.

In the case of composite volcanoes, both flowing lava and explosive eruptions can occur during different phases of an eruption or even simultaneously. The lava that flows from composite volcanoes is often thick and can accumulate near the vent, while explosive eruptions can occur due to built-up pressure from gas within the magma. This unique combination of both flowing lava and explosive activity distinguishes composite volcanoes from other types of volcanoes.

Thus, the correct response captures the dual nature of eruptions associated with these geologically significant structures, illustrating their complexity and dynamic behavior in the Earth’s geology.