Which of the following is not included in the three classes of volcanoes that are classified based on the frequency of their eruptions?
Volcanoes are classified into three types based on frequency: Active, Dormant and Extinct. A Composite volcano (or stratovolcano) is a classification based on structure and shape, not frequency. It refers to a volcano built up by many layers of hardened lava, tephra, pumice and volcanic ash. ANSWER: (B) Composite volcano
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