What is a preamble? please

How was classical persia's extensive network of roads important to its civilization?

Chief justice earl warren stated, “separate educational facilities are inherently unequal.” what did the use of “inherently” imply about segregation? 1/ by its very definition, it cannot be equal. 2/ it is an integral part of american society. 3/ based on its meaning, separation is a natural inclination. 4/ it was intended to be a state right, not a national mandate.

Before world war 1 started, austria-hungry was wary of (spain or serbia) because of border disputes