The climate of the costal plain is mild. It has hot summers and cool winters and few hard freezes.
Religion caused many Arabs to move through the Middle East.
During the 600s CE, an Arab expansion took place all over the Middle East. During these years, Muslim conquests became common, and this led to the establishment of unified Arabic empires, or "caliphates."
Ocean water is most saline in dense seawater.
answer: b. in dense seawater.
B? Human population are sometimes concentrated in areas that are lacking resources
