Final answer:
The eruption of Mount St. Helens in 1980 was significant due to its explosive nature and the loss of human lives, showcasing the violent power of volcanic eruptions.
Explanation:
The eruption of Mount St. Helens in 1980 was significant due to its explosive nature, causing widespread devastation and the loss of human lives. This event showcased the violent power of volcanic eruptions and the impact on the surrounding environment.
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