Which region is in the southeast corner of Washington?
Blue Mountains
Cascade Mountains
O Columbia Basin
Okanogan Highlands



Answer :

Final answer:

The Columbia Basin is the southeast region of Washington, covered by a flood basalt.


Explanation:

Columbia Basin is the region in the southeast corner of Washington state. This area was covered by a flood basalt known as the Columbia River basalts, creating the plateau.


Learn more about Regions in Washington State here:

https://brainly.com/question/38905471


c. columbia basin hope this helps