Which of the following is an example of how American indians of the Northwest coast were unique in how they practiced social organization

Green corn ceremony

Iroqouis league

mound building

potlatch

Potlatch

Explanation:

Potlach is actually an exchange institution for some groups of Indians who lived on the Northwestern coast. Throughout it large quantities of goods are collected and given or even destroyed. The process itself can be understood as a competition in gift giving. Basically, everyone who wanted some social prestige had to give up of some material goods.

D) Potlatch is an example of how American indians of the Northwest coast were unique in how they practiced social organization.

Explanation:

The American Indians of the northwest coast host a ceremony named Potlatch to give away possessions to show off their wealth to the common people. The word comes from Chinook jargon which means to "give away" or a "gift". The potlatch was organised in case of birth, death, wedding etc.

The northwest coast also has a system of house society, and the potlatch ceremony is also hoisted by a house. The house was generally headed by aristocrats but on some occasions common people and slaves also participated. The potlatch can be hosted only by the rich people, slaves were not allowed there. Sometimes, multiple potlatch ceremonies was also organised.