Which of the following are associated with composite volcanoes?

I. They result in explosive eruptions.
II. They eject pyroclastic materials.
III. Pyroclastic materials and ashes accumulate near the vent, forming layers.

Select the correct answer using the code given below.

Composite volcanoes, also known as stratovolcanoes, are characterized by eruptions of cooler and more viscous lavas than basalt. Due to the high viscosity and trapped gases, these volcanoes often result in explosive eruptions. Along with lava, they eject large quantities of pyroclastic materials (fragmented rock) and ashes. This material accumulates in the vicinity of the vent openings, leading to the formation of distinct layers. This layering of ash, pyroclastic debris, and lava flows is what gives them the name "composite" volcanoes. Common examples include Mount Fuji in Japan and Mount St. Helens in the USA. Since all three statements accurately describe the characteristics of composite volcanoes, the correct answer is I, II, and III.