Which american region were groups of native americans known for living in longhouses and using ''slash and burn'' techniques for farming

I believe the correct answer is the Eastern Woodlands.
Slash and burn technique refers to cutting and burning down the trees and plants in a forest, so obviously the most correct choice would involve having a forest, or a woodland. This is why the Eastern Woodlands is the correct option, in my opinion. 

Delaware, pennsylvania, new jersey, georgia, connecticut, massachusetts bay, maryland, south carolina, new hampshire, virginia, new york, north carolina, and rhode island and providence plantations where the 13 original colonies