How does the concept of retrogration reinforce the heliocentric model of the the solar system? It shows that Earth is stationary and all objects rotate around it, therefore the Earth is the center of the solar system
It shows that planets change speed
It shows that all planets move in elliptical orbits
It shows that the Earth must be moving and is therefore not the center of the solar system

the anwser is missions

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.