Plateau Indians lived in
tree tents.
brick huts.
mud houses.
teepees.

I believe the answer in tree tents

Explanation:

Plateau tribes lived in longhouses made from tule mats. Tule is a tall, tough reed that grows in marshy areas and is sometimes called bulrush. In the winter, they dug a shallow pit and built a roof with poles and covered them with tule mats or tree bark. In later years, canvas was used instead of tule mats.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

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