Which natural features are of the cascade mountain regions

The North Cascades are steep, rugged, glaciated mountains formed by volcanic activity. The highest peaks are volcanoes such as Mt. Baker and Glacier Peak, which rise to more than 10,000 feet. Valleys bottoms go down as low as 500 feet.

Explanation:

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geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to