Which of the following is true about the grand coulee dam?

It is almost as tall as Niagara falls.
It provides hydroelectric power.
It is the only naturally occurring dam in the Columbia plateau.
It is the only dam on the Columbia River

The following statement is true about the Grand Coulee Dam: It provides hydroelectric power.

which of the following regions hosts the Omak stampede every year as a reminder of its heritage as a horse country

Cascade mountains
Columbia Plateau
Okanogan Highlands
Puget Sound Lowlands

The correct answer is Okanogan Highlands.

which best describes the relationship between the rain shadow effect and the Okanogan highlands?

It causes deep trench valleys throughout the mountains.
it limits the amount of rainfall in the region.
it causes the rivers to almost dry up.
It results in an enormous amount of snowfall.

The best description of the relationship between the rain shadow effect and the Okanogan Highlands is that it limits the amount of rainfall in the region.