What event prompted the creation of the department of homeland security?
a. the communist red scare
b. attack on pearl harbor
c. nuclear threat during the cold war
d. terrorist attacks on the world trade center and pentagon

c. taught scientists many new things about the earth, but not other planets.

explanation:

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.