The main reason why the Native Americans of the Northwest fought with other groups was D. to stop other groups from taking their food and water
This refers to the armed conflict that exists between two or more entities in a fight for supremacy and dominion
Hence, we can see that The main reason why the Native Americans of the Northwest fought with other groups was D. to stop other groups from taking their food and water
Read more about Native Americans here:
https://brainly.com/question/24724492
#SPJ1