Why did the Incas build Machu Picchu

They wanted to use it as a hide-out

Explanation:

Hi!

The incas built Machu Picchu because their intention was to use it a a fortress, or as natural-looking protection from any potential invaders.

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answer: the apache, comanche, kiowa, crow, and osage tribes are plains indians.  

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.