Final answer:
The kind of desert found in eastern Washington is the Continental-interior desert. Eastern Washington experiences a semi-arid condition due to the rain shadow effect created by the Cascade mountain range.
Step-by-step explanation:
The kind of desert found in eastern Washington is Continental-interior desert (d). Eastern Washington experiences a semi-arid condition due to the rain shadow effect created by the Cascade mountain range. As moist air masses from the Pacific Ocean move over the mountains, they lose their moisture, resulting in less rainfall in eastern Washington and the creation of a desert-like environment.