Why was the nile river important to early egyptians

World war 2 was caused, in part, by which of these factors?

Began during presidency of john q. adams tariff of 1828 and 1832 states’ rights versus federal authority john c. calhoun’s ‘proclamation to the people of south carolina’ concluded during the presidency of andrew jackson is which event are these characteristics describing

What did the introduction of silk into the mediterranean do for the abbasid empire