Which of the following helped the peoples of the Pacific Northwest develop a complex culture? the creation of totem poles
the custom of potlatches
the harsh climate
the abundance of food sources

d the wampanoag the pilgrims because the pilgrims protected them from their native americans foes.

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation:

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

during the early years of world war i, the germans used "the submarine" to a great advantage