Research the new methods of warfare used during WW I.

New Weapons

Explanation:

World war 1 introduced the Airplane such as the Sopwith Camel and Folker Triplane. Also machine guns and Chemical weapons such as mustard gas were introduced into the battlefield. And tanks

The correct answer that will complete the question stated above would be 'wood'. The natural resource that was abundantly available to the Northwest Indians was the resource wood. This is because there was an abundance of lumber and forest around the areas of the Northwest.