How is physical weathering different from chemical weathering

In chemical weathering, the composition of the weathered substance is changed.

Explanation:

Weathering processes crack, wear away, and weaken rocks. ... Physical and chemical weathering degrade rocks in different ways. While physical weathering breaks down a rock's physical structure, chemical weathering alters a rock's chemical composition. Welcome.

option c

explanation:

strive for superiority

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.