which type of movement has occurred significantly in Washington over the last 50 years?

Question

native tribes have continued their nomadic lifestyles within the modern landscape
native tribes have moved onto reservations away from growing cities
washingtonians have moved into suburban areas
washingtonians have moved into major urban centers causing rapid growth to already large cities

Answer 1

The movement that has occurred significantly in Washington over the last 50 years is that Washingtonians have moved into major urban centers, causing rapid growth to already large cities.