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Tsunamis, large ocean waves caused by underwater earthquakes, can be deadly and destructive. For example, in December 2004, an underwater earthquake triggered a massive tsunami throughout the Indian Ocean. The tsunami killed more than 200,000 people and caused billions of dollars of damage to the coasts of numerous Southeast Asian countries. The main idea of this paragraph is A. Tsunamis B. Tsunamis, large ocean waves caused by underwater earthquakes, can be deadly and destructive. C. The tsunami killed more than 200,000 people and caused billions of dollars of damage to the coasts of numerous Southeast Asian countries
What is B. Tsunamis, large ocean waves caused by underwater earthquakes, can be deadly and destructive.