How did Indus River Valley civilizations use irrigation techniques? Farmers used irrigation to protect fields from land overuse. Farmers used irrigation to offset flooding and protect crops. Famers used irrigation to manage the water supply for crops. Famers used irrigation to create land for better roads and houses.

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explanation:

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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.