The forests of the pacific northwest are just one of the many different in the united states where many people work in the same industry.
a. elevation regions
b. political regions
c. climate regions
d. economic regions

(D) Economic regions

Explanation:

 The forests in the Pacific Northwest is the main region of western United States found adjoining the Pacific Ocean. A significant part of the Pacific Northwest comprises of rustic forested land; in any case, there are a few enormous populace focuses which incorporate Seattle and Tacoma.

The economic region is mainly denoted as ER and it is basically define as gathering of complete enumeration divisions (with one special case in the Ontario) are created in the form of standard geographic unit for the examination of provincial monetary action.

Therefore, Option (D) is correct.