The decline of both the Han Dynasty and the Roman Empire were a slow process. What of these factors was a catalyst for the decline of both these great powers?

the right answer is d

hey.

the answer is. b) to protect migrating native american tribes .

and, c) to protect migrating native american tribes .

hope this , if it does, consider marking me brainiest! uwu

both eastern and western early north american cultures were known for building wigwams and longhouses.

wigwams, also called wetus, were small houses of 8-10 feet tall, made of wooden frames covered with woven mats and sheets that were used by algonquian indians. similarly,   longhouses were also used by algonquian and the iroquois tribes, and they were built as well with pole frames and elm bark covering. however, the main difference between wigwams and longhouses is that the latter was much larger than the former, with 200 feet long, 20 feet wide, and 20 feet high with inner raised platforms used for sleeping space.